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vd_employees_1
employees
MySQL employees sample DB
How many employees are currently assigned to each department?
Current assignment is indicated by to_date = '9999-01-01' (a sentinel far-future date). Naive IS NULL returns empty.
SELECT d.dept_name, COUNT(*) AS cnt FROM dept_emp de JOIN departments d ON de.dept_no=d.dept_no WHERE de.to_date='9999-01-01' GROUP BY d.dept_name ORDER BY cnt DESC
CREATE TABLE departments (dept_no VARCHAR, dept_name VARCHAR); CREATE TABLE dept_emp (emp_no BIGINT, dept_no VARCHAR, from_date DATE, to_date DATE); CREATE TABLE dept_manager (dept_no VARCHAR, emp_no BIGINT, from_date DATE, to_date DATE); CREATE TABLE employees (emp_no BIGINT, birth_date DATE, first_name VARCHAR, last_...
[ [ "Development", "61386" ], [ "Production", "53304" ], [ "Sales", "37701" ], [ "Customer Service", "17569" ], [ "Research", "15441" ], [ "Marketing", "14842" ], [ "Quality Management", "14546" ], [ "Human Resources", "12898"...
vd_employees_2
employees
MySQL employees sample DB
Who is the current manager of each department?
Current manager tenure is indicated by dept_manager.to_date = '9999-01-01'. Naive IS NULL returns empty.
SELECT d.dept_name, e.first_name, e.last_name FROM dept_manager dm JOIN departments d ON dm.dept_no=d.dept_no JOIN employees e ON dm.emp_no=e.emp_no WHERE dm.to_date='9999-01-01' ORDER BY d.dept_name
CREATE TABLE departments (dept_no VARCHAR, dept_name VARCHAR); CREATE TABLE dept_emp (emp_no BIGINT, dept_no VARCHAR, from_date DATE, to_date DATE); CREATE TABLE dept_manager (dept_no VARCHAR, emp_no BIGINT, from_date DATE, to_date DATE); CREATE TABLE employees (emp_no BIGINT, birth_date DATE, first_name VARCHAR, last_...
[ [ "Customer Service", "Yuchang", "Weedman" ], [ "Development", "Leon", "DasSarma" ], [ "Finance", "Isamu", "Legleitner" ], [ "Human Resources", "Karsten", "Sigstam" ], [ "Marketing", "Vishwani", "Minakawa" ], [ "Production", "Os...
vd_employees_3
employees
MySQL employees sample DB
What is the current average salary for female employees?
Two conventions must be discovered: (1) current salary uses to_date = '9999-01-01' sentinel; (2) female gender is encoded as single-letter 'F', not 'Female'.
SELECT ROUND(AVG(s.salary), 2) AS avg_salary FROM salaries s JOIN employees e ON s.emp_no=e.emp_no WHERE s.to_date='9999-01-01' AND e.gender='F'
CREATE TABLE departments (dept_no VARCHAR, dept_name VARCHAR); CREATE TABLE dept_emp (emp_no BIGINT, dept_no VARCHAR, from_date DATE, to_date DATE); CREATE TABLE dept_manager (dept_no VARCHAR, emp_no BIGINT, from_date DATE, to_date DATE); CREATE TABLE employees (emp_no BIGINT, birth_date DATE, first_name VARCHAR, last_...
[ [ "71963.57" ] ]
vd_employees_4
employees
MySQL employees sample DB
How many employees currently hold the title of Senior Engineer?
Two conventions: current title uses to_date = '9999-01-01'; exact title string is 'Senior Engineer' (title-case, two words). Naive IS NULL + lowercase returns 0.
SELECT COUNT(*) FROM titles WHERE to_date='9999-01-01' AND title='Senior Engineer'
CREATE TABLE departments (dept_no VARCHAR, dept_name VARCHAR); CREATE TABLE dept_emp (emp_no BIGINT, dept_no VARCHAR, from_date DATE, to_date DATE); CREATE TABLE dept_manager (dept_no VARCHAR, emp_no BIGINT, from_date DATE, to_date DATE); CREATE TABLE employees (emp_no BIGINT, birth_date DATE, first_name VARCHAR, last_...
[ [ "85939" ] ]
vd_tpch_sf001_1
tpch_sf001
TPC-H
What is the total quantity of line items that were returned?
Return status is encoded as single-letter code 'R' in l_returnflag. Naive 'returned' returns NULL.
SELECT SUM(l_quantity) FROM lineitem WHERE l_returnflag='R'
CREATE TABLE customer (c_custkey BIGINT, c_name VARCHAR, c_address VARCHAR, c_nationkey INTEGER, c_phone VARCHAR, c_acctbal DECIMAL(15,2), c_mktsegment VARCHAR, c_comment VARCHAR); CREATE TABLE lineitem (l_orderkey BIGINT, l_partkey BIGINT, l_suppkey BIGINT, l_linenumber BIGINT, l_quantity DECIMAL(15,2), l_extendedpric...
[ [ "381449.00" ] ]
vd_tpch_sf001_2
tpch_sf001
TPC-H
What is the total net revenue from customers in the automobile market segment?
Market segment is stored in uppercase: 'AUTOMOBILE'. Naive lowercase 'automobile' returns NULL.
SELECT SUM(l.l_extendedprice * (1 - l.l_discount)) AS revenue FROM lineitem l JOIN orders o ON l.l_orderkey=o.o_orderkey JOIN customer c ON o.o_custkey=c.c_custkey WHERE c.c_mktsegment='AUTOMOBILE'
CREATE TABLE customer (c_custkey BIGINT, c_name VARCHAR, c_address VARCHAR, c_nationkey INTEGER, c_phone VARCHAR, c_acctbal DECIMAL(15,2), c_mktsegment VARCHAR, c_comment VARCHAR); CREATE TABLE lineitem (l_orderkey BIGINT, l_partkey BIGINT, l_suppkey BIGINT, l_linenumber BIGINT, l_quantity DECIMAL(15,2), l_extendedpric...
[ [ "406079266.3105" ] ]
vd_tpch_sf001_3
tpch_sf001
TPC-H
How many orders are currently open (not yet fulfilled or pending)?
Open order status is a single-letter code 'O'. Naive 'open' returns 0.
SELECT COUNT(*) FROM orders WHERE o_orderstatus='O'
CREATE TABLE customer (c_custkey BIGINT, c_name VARCHAR, c_address VARCHAR, c_nationkey INTEGER, c_phone VARCHAR, c_acctbal DECIMAL(15,2), c_mktsegment VARCHAR, c_comment VARCHAR); CREATE TABLE lineitem (l_orderkey BIGINT, l_partkey BIGINT, l_suppkey BIGINT, l_linenumber BIGINT, l_quantity DECIMAL(15,2), l_extendedpric...
[ [ "7333" ] ]
vd_tpch_sf001_4
tpch_sf001
TPC-H
How many orders have urgent priority?
Priority is stored with a numeric rank prefix: '1-URGENT'. Naive 'URGENT' without prefix returns 0.
SELECT COUNT(*) FROM orders WHERE o_orderpriority='1-URGENT'
CREATE TABLE customer (c_custkey BIGINT, c_name VARCHAR, c_address VARCHAR, c_nationkey INTEGER, c_phone VARCHAR, c_acctbal DECIMAL(15,2), c_mktsegment VARCHAR, c_comment VARCHAR); CREATE TABLE lineitem (l_orderkey BIGINT, l_partkey BIGINT, l_suppkey BIGINT, l_linenumber BIGINT, l_quantity DECIMAL(15,2), l_extendedpric...
[ [ "3020" ] ]
vd_spider_customer_deliveries_1
spider_customer_deliveries
Spider
How many actual orders were cancelled?
Cancellation is stored as 'Cancel' (title-case, no trailing 'd'). Naive 'cancelled' or 'CANCEL' returns 0.
SELECT COUNT(*) FROM Actual_Orders WHERE order_status_code='Cancel'
CREATE TABLE Actual_Orders (actual_order_id VARCHAR, order_status_code VARCHAR, regular_order_id VARCHAR, actual_order_date VARCHAR); CREATE TABLE Actual_Order_Products (actual_order_id VARCHAR, product_id VARCHAR); CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR, city VARCHAR, zip_postcode VARCHAR,...
[ [ "10" ] ]
vd_spider_customer_deliveries_2
spider_customer_deliveries
Spider
How many deliveries are currently in transit (on the road)?
In-transit status is stored as 'On Road' (two words, title-case). Naive lowercase 'on road' returns 0.
SELECT COUNT(*) FROM Order_Deliveries WHERE delivery_status_code='On Road'
CREATE TABLE Actual_Orders (actual_order_id VARCHAR, order_status_code VARCHAR, regular_order_id VARCHAR, actual_order_date VARCHAR); CREATE TABLE Actual_Order_Products (actual_order_id VARCHAR, product_id VARCHAR); CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR, city VARCHAR, zip_postcode VARCHAR,...
[ [ "4" ] ]
vd_spider_dog_kennels_1
spider_dog_kennels
Spider
How many dogs of each breed have been abandoned at the kennel?
Abandoned status is stored as '1' (integer flag), not 'yes' or 'true'
SELECT b.breed_name, COUNT(*) as cnt FROM Dogs d JOIN Breeds b ON d.breed_code = b.breed_code WHERE d.abandoned_yn = '1' GROUP BY b.breed_name
CREATE TABLE Breeds (breed_code VARCHAR, breed_name VARCHAR); CREATE TABLE Charges (charge_id VARCHAR, charge_type VARCHAR, charge_amount VARCHAR); CREATE TABLE Dogs (dog_id VARCHAR, owner_id VARCHAR, abandoned_yn VARCHAR, breed_code VARCHAR, size_code VARCHAR, name VARCHAR, age VARCHAR, date_of_birth VARCHAR, gender V...
[ [ "Eskimo", "2" ], [ "Bulldog", "1" ] ]
vd_spider_dog_kennels_2
spider_dog_kennels
Spider
How many male dogs are currently in the kennel?
Male gender is encoded as '1'; female is '0'. The column stores binary integers, not strings like 'male'/'female'.
SELECT COUNT(*) FROM Dogs WHERE gender = '1'
CREATE TABLE Breeds (breed_code VARCHAR, breed_name VARCHAR); CREATE TABLE Charges (charge_id VARCHAR, charge_type VARCHAR, charge_amount VARCHAR); CREATE TABLE Dogs (dog_id VARCHAR, owner_id VARCHAR, abandoned_yn VARCHAR, breed_code VARCHAR, size_code VARCHAR, name VARCHAR, age VARCHAR, date_of_birth VARCHAR, gender V...
[ [ "6" ] ]
vd_spider_dog_kennels_3
spider_dog_kennels
Spider
What is the charge amount for daily accommodation?
The charge type is stored as 'Daily Accommodation' (title-cased, exact spacing), not 'accommodation' or 'daily_accommodation'.
SELECT charge_amount FROM Charges WHERE charge_type = 'Daily Accommodation'
CREATE TABLE Breeds (breed_code VARCHAR, breed_name VARCHAR); CREATE TABLE Charges (charge_id VARCHAR, charge_type VARCHAR, charge_amount VARCHAR); CREATE TABLE Dogs (dog_id VARCHAR, owner_id VARCHAR, abandoned_yn VARCHAR, breed_code VARCHAR, size_code VARCHAR, name VARCHAR, age VARCHAR, date_of_birth VARCHAR, gender V...
[ [ "98" ] ]
vd_spider_dog_kennels_4
spider_dog_kennels
Spider
How many distinct dogs have received a vaccination treatment?
Vaccination is stored as the three-letter code 'VAC', not the full word 'Vaccination'.
SELECT COUNT(DISTINCT dog_id) FROM Treatments WHERE treatment_type_code = 'VAC'
CREATE TABLE Breeds (breed_code VARCHAR, breed_name VARCHAR); CREATE TABLE Charges (charge_id VARCHAR, charge_type VARCHAR, charge_amount VARCHAR); CREATE TABLE Dogs (dog_id VARCHAR, owner_id VARCHAR, abandoned_yn VARCHAR, breed_code VARCHAR, size_code VARCHAR, name VARCHAR, age VARCHAR, date_of_birth VARCHAR, gender V...
[ [ "5" ] ]
vd_spider_dog_kennels_5
spider_dog_kennels
Spider
How many large dogs are registered at the kennel?
Large size is stored as the three-letter code 'LGE', not 'Large' or 'large'.
SELECT COUNT(*) FROM Dogs WHERE size_code = 'LGE'
CREATE TABLE Breeds (breed_code VARCHAR, breed_name VARCHAR); CREATE TABLE Charges (charge_id VARCHAR, charge_type VARCHAR, charge_amount VARCHAR); CREATE TABLE Dogs (dog_id VARCHAR, owner_id VARCHAR, abandoned_yn VARCHAR, breed_code VARCHAR, size_code VARCHAR, name VARCHAR, age VARCHAR, date_of_birth VARCHAR, gender V...
[ [ "4" ] ]
vd_spider_document_management_1
spider_document_management
Spider
How many documents are of type curriculum vitae?
Curriculum vitae documents are stored with document_type_code = 'CV' (all-caps abbreviation), not 'curriculum vitae' or 'resume'.
SELECT COUNT(*) FROM Documents WHERE document_type_code = 'CV'
CREATE TABLE Documents (document_code VARCHAR, document_structure_code VARCHAR, document_type_code VARCHAR, access_count VARCHAR, document_name VARCHAR); CREATE TABLE Document_Functional_Areas (document_code VARCHAR, functional_area_code VARCHAR); CREATE TABLE Document_Sections (section_id VARCHAR, document_code VARCHA...
[ [ "3" ] ]
vd_spider_document_management_2
spider_document_management
Spider
How many users have the Project Manager role?
Project Manager role is stored as the hyphenated code 'PROJ-MGR', not 'Project Manager' (the full description).
SELECT COUNT(*) FROM Users WHERE role_code = 'PROJ-MGR'
CREATE TABLE Documents (document_code VARCHAR, document_structure_code VARCHAR, document_type_code VARCHAR, access_count VARCHAR, document_name VARCHAR); CREATE TABLE Document_Functional_Areas (document_code VARCHAR, functional_area_code VARCHAR); CREATE TABLE Document_Sections (section_id VARCHAR, document_code VARCHA...
[ [ "7" ] ]
vd_spider_document_management_3
spider_document_management
Spider
How many users are currently logged in?
Active login is stored as '1' (string boolean flag), not 'true', 'yes', or 'active'.
SELECT COUNT(*) FROM Users WHERE user_login = '1'
CREATE TABLE Documents (document_code VARCHAR, document_structure_code VARCHAR, document_type_code VARCHAR, access_count VARCHAR, document_name VARCHAR); CREATE TABLE Document_Functional_Areas (document_code VARCHAR, functional_area_code VARCHAR); CREATE TABLE Document_Sections (section_id VARCHAR, document_code VARCHA...
[ [ "7" ] ]
vd_spider_formula_1_1
spider_formula_1
Spider
How many race results ended with a retirement?
Retired finishes are stored as positionText = 'R' (single capital letter), not 'Retired' or 'DNF'.
SELECT COUNT(*) FROM results WHERE positionText = 'R'
CREATE TABLE circuits (circuitId VARCHAR, circuitRef VARCHAR, name VARCHAR, location VARCHAR, country VARCHAR, lat VARCHAR, lng VARCHAR, alt VARCHAR, url VARCHAR); CREATE TABLE constructorResults (constructorResultsId VARCHAR, raceId VARCHAR, constructorId VARCHAR, points VARCHAR, status VARCHAR); CREATE TABLE construc...
[ [ "8517" ] ]
vd_spider_formula_1_2
spider_formula_1
Spider
How many constructors have Belgian nationality?
Belgian constructors are stored with nationality = 'Belgium' (country name, not the demonym 'Belgian'). Note: drivers use 'Belgian' but constructors use 'Belgium'.
SELECT COUNT(*) FROM constructors WHERE nationality = 'Belgium'
CREATE TABLE circuits (circuitId VARCHAR, circuitRef VARCHAR, name VARCHAR, location VARCHAR, country VARCHAR, lat VARCHAR, lng VARCHAR, alt VARCHAR, url VARCHAR); CREATE TABLE constructorResults (constructorResultsId VARCHAR, raceId VARCHAR, constructorId VARCHAR, points VARCHAR, status VARCHAR); CREATE TABLE construc...
[ [ "1" ] ]
vd_spider_formula_1_3
spider_formula_1
Spider
How many constructor championship result entries have been marked as disqualified?
Disqualified constructor results are flagged with status = 'D' (single letter code); the default non-disqualified value is the string 'NULL'.
SELECT COUNT(*) FROM constructorResults WHERE status = 'D'
CREATE TABLE circuits (circuitId VARCHAR, circuitRef VARCHAR, name VARCHAR, location VARCHAR, country VARCHAR, lat VARCHAR, lng VARCHAR, alt VARCHAR, url VARCHAR); CREATE TABLE constructorResults (constructorResultsId VARCHAR, raceId VARCHAR, constructorId VARCHAR, points VARCHAR, status VARCHAR); CREATE TABLE construc...
[ [ "17" ] ]
vd_seaborn_titanic_manifest_1
seaborn_titanic_manifest
seaborn-data
How many passengers boarded at Southampton?
Southampton is stored as single-letter code 'S' in the embarked column, not the full city name
SELECT COUNT(*) FROM passenger_manifest WHERE embarked = 'S'
CREATE TABLE embark_ports (embarked VARCHAR, embark_town VARCHAR); CREATE TABLE passenger_manifest (passenger_id BIGINT, survived INTEGER, pclass INTEGER, sex VARCHAR, age DOUBLE, sibsp INTEGER, parch INTEGER, fare DOUBLE, embarked VARCHAR, passenger_class VARCHAR, who VARCHAR, adult_male BOOLEAN, deck VARCHAR, embark_...
[ [ "644" ] ]
vd_seaborn_titanic_manifest_2
seaborn_titanic_manifest
seaborn-data
What was the average fare paid by passengers who boarded at Cherbourg?
Cherbourg is stored as single-letter code 'C' in the embarked column, not the full city name
SELECT ROUND(AVG(fare),2) FROM passenger_manifest WHERE embarked = 'C'
CREATE TABLE embark_ports (embarked VARCHAR, embark_town VARCHAR); CREATE TABLE passenger_manifest (passenger_id BIGINT, survived INTEGER, pclass INTEGER, sex VARCHAR, age DOUBLE, sibsp INTEGER, parch INTEGER, fare DOUBLE, embarked VARCHAR, passenger_class VARCHAR, who VARCHAR, adult_male BOOLEAN, deck VARCHAR, embark_...
[ [ "59.95" ] ]
vd_seaborn_titanic_manifest_3
seaborn_titanic_manifest
seaborn-data
What fraction of passengers who boarded at Queenstown survived?
Queenstown is stored as single-letter code 'Q' in the embarked column, not the full city name
SELECT ROUND(AVG(CAST(survived AS DOUBLE)),4) FROM passenger_manifest WHERE embarked = 'Q'
CREATE TABLE embark_ports (embarked VARCHAR, embark_town VARCHAR); CREATE TABLE passenger_manifest (passenger_id BIGINT, survived INTEGER, pclass INTEGER, sex VARCHAR, age DOUBLE, sibsp INTEGER, parch INTEGER, fare DOUBLE, embarked VARCHAR, passenger_class VARCHAR, who VARCHAR, adult_male BOOLEAN, deck VARCHAR, embark_...
[ [ "0.3896" ] ]
vd_seaborn_titanic_manifest_4
seaborn_titanic_manifest
seaborn-data
How many children were on board the Titanic?
Children are stored as 'child' in the who column (not 'minor', 'boy', 'girl', or 'kid')
SELECT COUNT(*) FROM passenger_manifest WHERE who = 'child'
CREATE TABLE embark_ports (embarked VARCHAR, embark_town VARCHAR); CREATE TABLE passenger_manifest (passenger_id BIGINT, survived INTEGER, pclass INTEGER, sex VARCHAR, age DOUBLE, sibsp INTEGER, parch INTEGER, fare DOUBLE, embarked VARCHAR, passenger_class VARCHAR, who VARCHAR, adult_male BOOLEAN, deck VARCHAR, embark_...
[ [ "83" ] ]
vd_seaborn_penguin_biometry_1
seaborn_penguin_biometry
seaborn-data
How many male penguins are in the dataset?
Sex values are stored in all-uppercase: 'MALE' and 'FEMALE', not lowercase 'male'/'female'
SELECT COUNT(*) FROM penguin_measurements WHERE sex = 'MALE'
CREATE TABLE islands (island_id BIGINT, island VARCHAR); CREATE TABLE penguin_measurements (penguin_id BIGINT, species VARCHAR, island VARCHAR, bill_length_mm DOUBLE, bill_depth_mm DOUBLE, flipper_length_mm DOUBLE, body_mass_g DOUBLE, sex VARCHAR); CREATE TABLE species (species_id BIGINT, species VARCHAR);
[ [ "168" ] ]
vd_seaborn_penguin_biometry_2
seaborn_penguin_biometry
seaborn-data
What is the average body mass of Gentoo penguins?
Species names use title case with exact spelling: 'Gentoo' (not 'gentoo' or 'GENTOO')
SELECT ROUND(AVG(body_mass_g),1) FROM penguin_measurements WHERE species = 'Gentoo'
CREATE TABLE islands (island_id BIGINT, island VARCHAR); CREATE TABLE penguin_measurements (penguin_id BIGINT, species VARCHAR, island VARCHAR, bill_length_mm DOUBLE, bill_depth_mm DOUBLE, flipper_length_mm DOUBLE, body_mass_g DOUBLE, sex VARCHAR); CREATE TABLE species (species_id BIGINT, species VARCHAR);
[ [ "5076.0" ] ]
vd_seaborn_penguin_biometry_3
seaborn_penguin_biometry
seaborn-data
What is the average bill length of Chinstrap penguins?
Species name stored as 'Chinstrap' (title case, one word — not 'chinstrap' or 'chin strap')
SELECT ROUND(AVG(bill_length_mm),2) FROM penguin_measurements WHERE species = 'Chinstrap'
CREATE TABLE islands (island_id BIGINT, island VARCHAR); CREATE TABLE penguin_measurements (penguin_id BIGINT, species VARCHAR, island VARCHAR, bill_length_mm DOUBLE, bill_depth_mm DOUBLE, flipper_length_mm DOUBLE, body_mass_g DOUBLE, sex VARCHAR); CREATE TABLE species (species_id BIGINT, species VARCHAR);
[ [ "48.83" ] ]
vd_seaborn_diamond_prices_1
seaborn_diamond_prices
seaborn-data
How many diamonds have a Very Good cut?
Cut grade stored as 'Very Good' (title case, two words with space — not 'very good', 'VeryGood', or 'VERY GOOD')
SELECT COUNT(*) FROM diamond_listings WHERE cut = 'Very Good'
CREATE TABLE clarity_grades (clarity VARCHAR); CREATE TABLE color_grades (color VARCHAR); CREATE TABLE cut_grades (cut VARCHAR); CREATE TABLE diamond_listings (diamond_id BIGINT, carat DOUBLE, cut VARCHAR, color VARCHAR, clarity VARCHAR, depth DOUBLE, table_pct DOUBLE, price INTEGER, x_mm DOUBLE, y_mm DOUBLE, z_mm DOUB...
[ [ "12082" ] ]
vd_seaborn_diamond_prices_2
seaborn_diamond_prices
seaborn-data
What is the average price of internally flawless diamonds?
Internally Flawless clarity is stored as the two-letter abbreviation 'IF', not the full phrase 'Internally Flawless'
SELECT ROUND(AVG(price),2) FROM diamond_listings WHERE clarity = 'IF'
CREATE TABLE clarity_grades (clarity VARCHAR); CREATE TABLE color_grades (color VARCHAR); CREATE TABLE cut_grades (cut VARCHAR); CREATE TABLE diamond_listings (diamond_id BIGINT, carat DOUBLE, cut VARCHAR, color VARCHAR, clarity VARCHAR, depth DOUBLE, table_pct DOUBLE, price INTEGER, x_mm DOUBLE, y_mm DOUBLE, z_mm DOUB...
[ [ "2864.84" ] ]
vd_seaborn_exoplanet_discoveries_1
seaborn_exoplanet_discoveries
seaborn-data
How many exoplanets were discovered using the radial velocity technique?
Radial velocity is stored as title-case 'Radial Velocity' (two words, not 'radial velocity', 'RV', or 'Radial velocity')
SELECT COUNT(*) FROM planet_discoveries WHERE method = 'Radial Velocity'
CREATE TABLE discovery_methods (method VARCHAR); CREATE TABLE discovery_years (discovery_year INTEGER, discovery_rows BIGINT); CREATE TABLE planet_discoveries (discovery_id BIGINT, method VARCHAR, planet_count INTEGER, orbital_period_days DOUBLE, mass_jupiter DOUBLE, distance_parsec DOUBLE, discovery_year INTEGER);
[ [ "553" ] ]
vd_seaborn_exoplanet_discoveries_2
seaborn_exoplanet_discoveries
seaborn-data
How many exoplanets were found via eclipse timing variations?
Eclipse timing variations stored as exact three-word title-case string 'Eclipse Timing Variations' (not 'ETV', 'eclipse timing', or 'eclipse timing variations')
SELECT COUNT(*) FROM planet_discoveries WHERE method = 'Eclipse Timing Variations'
CREATE TABLE discovery_methods (method VARCHAR); CREATE TABLE discovery_years (discovery_year INTEGER, discovery_rows BIGINT); CREATE TABLE planet_discoveries (discovery_id BIGINT, method VARCHAR, planet_count INTEGER, orbital_period_days DOUBLE, mass_jupiter DOUBLE, distance_parsec DOUBLE, discovery_year INTEGER);
[ [ "9" ] ]
vd_seaborn_iris_morphology_1
seaborn_iris_morphology
seaborn-data
What is the average sepal length for Iris setosa?
Iris species names are stored in all-lowercase: 'setosa', 'versicolor', 'virginica' (not title case 'Setosa' or full binomial 'iris setosa')
SELECT ROUND(AVG(sepal_length_cm),2) FROM iris_measurements WHERE species = 'setosa'
CREATE TABLE iris_measurements (flower_id BIGINT, sepal_length_cm DOUBLE, sepal_width_cm DOUBLE, petal_length_cm DOUBLE, petal_width_cm DOUBLE, species VARCHAR); CREATE TABLE iris_species (species_id BIGINT, species VARCHAR);
[ [ "5.01" ] ]
vd_adventureworkslt_1
adventureworkslt
AdventureWorksLT
How many products are currently available for sale (not yet discontinued)?
Products still for sale have SellEndDate IS NULL; a naive guess of SellEndDate > CURRENT_DATE returns 0 because all SellEndDate values are historical dates — the sentinel for 'active' is a NULL, not a future date.
SELECT COUNT(*) FROM Product WHERE SellEndDate IS NULL
CREATE TABLE Address (AddressID BIGINT, AddressLine1 VARCHAR, AddressLine2 VARCHAR, City VARCHAR, StateProvince VARCHAR, CountryRegion VARCHAR, PostalCode VARCHAR, rowguid VARCHAR, ModifiedDate TIMESTAMP); CREATE TABLE BuildVersion (SystemInformationID BIGINT, Database Version VARCHAR, VersionDate TIMESTAMP, ModifiedDa...
[ [ "197" ] ]
vd_adventureworkslt_2
adventureworkslt
AdventureWorksLT
How many product descriptions are available in English?
The Culture column stores language codes with trailing spaces padded to 6 characters: English is stored as 'en ' (2 chars + 4 spaces). Filtering on 'en' (no padding) returns 0.
SELECT COUNT(*) FROM ProductModelProductDescription WHERE Culture = 'en '
CREATE TABLE Address (AddressID BIGINT, AddressLine1 VARCHAR, AddressLine2 VARCHAR, City VARCHAR, StateProvince VARCHAR, CountryRegion VARCHAR, PostalCode VARCHAR, rowguid VARCHAR, ModifiedDate TIMESTAMP); CREATE TABLE BuildVersion (SystemInformationID BIGINT, Database Version VARCHAR, VersionDate TIMESTAMP, ModifiedDa...
[ [ "127" ] ]
vd_adventureworkslt_3
adventureworkslt
AdventureWorksLT
How many customer addresses are in the United Kingdom?
The country is stored as 'United Kingdom' in CountryRegion, not 'UK', 'GB', or 'England'. Using 'UK' returns 0.
SELECT COUNT(*) FROM Address WHERE CountryRegion = 'United Kingdom'
CREATE TABLE Address (AddressID BIGINT, AddressLine1 VARCHAR, AddressLine2 VARCHAR, City VARCHAR, StateProvince VARCHAR, CountryRegion VARCHAR, PostalCode VARCHAR, rowguid VARCHAR, ModifiedDate TIMESTAMP); CREATE TABLE BuildVersion (SystemInformationID BIGINT, Database Version VARCHAR, VersionDate TIMESTAMP, ModifiedDa...
[ [ "40" ] ]
vd_adventureworkslt_4
adventureworkslt
AdventureWorksLT
How many products have a silver and black two-tone color finish?
Two-tone silver/black products are stored with Color = 'Silver/Black' (slash-separated compound value), not as 'Silver' or 'Black' separately. Filtering on 'Silver' OR 'Black' returns 125 (a completely different set).
SELECT COUNT(*) FROM Product WHERE Color = 'Silver/Black'
CREATE TABLE Address (AddressID BIGINT, AddressLine1 VARCHAR, AddressLine2 VARCHAR, City VARCHAR, StateProvince VARCHAR, CountryRegion VARCHAR, PostalCode VARCHAR, rowguid VARCHAR, ModifiedDate TIMESTAMP); CREATE TABLE BuildVersion (SystemInformationID BIGINT, Database Version VARCHAR, VersionDate TIMESTAMP, ModifiedDa...
[ [ "7" ] ]
vd_adventureworkslt_5
adventureworkslt
AdventureWorksLT
How many customer-address records use 'Main Office' as the address type (i.e., the primary business address rather than a shipping location)?
The non-shipping address type is stored as 'Main Office', not 'Billing', 'Primary', or 'Home'. Filtering on 'Billing' returns 0.
SELECT COUNT(*) FROM CustomerAddress WHERE AddressType = 'Main Office'
CREATE TABLE Address (AddressID BIGINT, AddressLine1 VARCHAR, AddressLine2 VARCHAR, City VARCHAR, StateProvince VARCHAR, CountryRegion VARCHAR, PostalCode VARCHAR, rowguid VARCHAR, ModifiedDate TIMESTAMP); CREATE TABLE BuildVersion (SystemInformationID BIGINT, Database Version VARCHAR, VersionDate TIMESTAMP, ModifiedDa...
[ [ "407" ] ]
vd_world_cities_1
world_cities
MySQL world sample DB
How many countries are located in the South-Eastern Asia subregion?
The subregion is stored as 'South-Eastern Asia' (hyphenated, with internal capital E). Common alternate spellings 'Southeast Asia' and 'Southeastern Asia' return 0.
SELECT COUNT(*) FROM countries WHERE subregion = 'South-Eastern Asia'
CREATE TABLE countries (id BIGINT, name VARCHAR, iso3 VARCHAR, iso2 VARCHAR, numeric_code VARCHAR, phonecode VARCHAR, capital VARCHAR, currency VARCHAR, currency_name VARCHAR, currency_symbol VARCHAR, tld VARCHAR, native VARCHAR, population BIGINT, gdp BIGINT, region VARCHAR, region_id BIGINT, subregion VARCHAR, subreg...
[ [ "11" ] ]
vd_world_cities_2
world_cities
MySQL world sample DB
How many administrative divisions (states) does the United Kingdom have in this dataset?
The United Kingdom's ISO 3166-1 alpha-2 code is 'GB', not 'UK'. Filtering on country_code = 'UK' returns 0.
SELECT COUNT(*) FROM states WHERE country_code = 'GB'
CREATE TABLE countries (id BIGINT, name VARCHAR, iso3 VARCHAR, iso2 VARCHAR, numeric_code VARCHAR, phonecode VARCHAR, capital VARCHAR, currency VARCHAR, currency_name VARCHAR, currency_symbol VARCHAR, tld VARCHAR, native VARCHAR, population BIGINT, gdp BIGINT, region VARCHAR, region_id BIGINT, subregion VARCHAR, subreg...
[ [ "221" ] ]
vd_world_cities_3
world_cities
MySQL world sample DB
How many German federal states (Lander) are recorded in the states table?
German administrative divisions are stored with type = 'land' (the German word), not 'state' or 'province'. Filtering on type = 'state' or 'province' returns 0.
SELECT COUNT(*) FROM states WHERE country_code = 'DE' AND type = 'land'
CREATE TABLE countries (id BIGINT, name VARCHAR, iso3 VARCHAR, iso2 VARCHAR, numeric_code VARCHAR, phonecode VARCHAR, capital VARCHAR, currency VARCHAR, currency_name VARCHAR, currency_symbol VARCHAR, tld VARCHAR, native VARCHAR, population BIGINT, gdp BIGINT, region VARCHAR, region_id BIGINT, subregion VARCHAR, subreg...
[ [ "16" ] ]
vd_world_cities_4
world_cities
MySQL world sample DB
How many countries use the Euro as their official currency?
Currency is stored as the ISO 4217 three-letter code 'EUR', not the spelled-out name 'Euro'. Filtering on currency = 'Euro' returns 0.
SELECT COUNT(*) FROM countries WHERE currency = 'EUR'
CREATE TABLE countries (id BIGINT, name VARCHAR, iso3 VARCHAR, iso2 VARCHAR, numeric_code VARCHAR, phonecode VARCHAR, capital VARCHAR, currency VARCHAR, currency_name VARCHAR, currency_symbol VARCHAR, tld VARCHAR, native VARCHAR, population BIGINT, gdp BIGINT, region VARCHAR, region_id BIGINT, subregion VARCHAR, subreg...
[ [ "36" ] ]
vd_spider_department_store_1
spider_department_store
Spider
How many customer orders are in a partially filled status?
The partially filled status is stored as the single concatenated token 'PartFilled', not 'Partial', 'Partially Filled', or 'Part Filled'. Naive guesses return 0.
SELECT COUNT(*) FROM Customer_Orders WHERE order_status_code = 'PartFilled'
CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR); CREATE TABLE Customers (customer_id VARCHAR, payment_method_code VARCHAR, customer_code VARCHAR, customer_name VARCHAR, customer_address VARCHAR, customer_phone VARCHAR, customer_email VARCHAR); CREATE TABLE Customer_Addresses (customer_id VARCHAR, a...
[ [ "3" ] ]
vd_spider_department_store_2
spider_department_store
Spider
How many customers pay using direct debit?
The payment method is stored as 'Direct Debit' (two words, title case). A naive guess of 'Debit' or 'direct debit' returns 0.
SELECT COUNT(*) FROM Customers WHERE payment_method_code = 'Direct Debit'
CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR); CREATE TABLE Customers (customer_id VARCHAR, payment_method_code VARCHAR, customer_code VARCHAR, customer_name VARCHAR, customer_address VARCHAR, customer_phone VARCHAR, customer_email VARCHAR); CREATE TABLE Customer_Addresses (customer_id VARCHAR, a...
[ [ "5" ] ]
vd_spider_department_store_3
spider_department_store
Spider
How many products belong to the clothing/apparel category?
Clothing products are stored with product_type_code = 'Clothes' (not 'Clothing' or 'Apparel'). Both of those naive guesses return 0.
SELECT COUNT(*) FROM Products WHERE product_type_code = 'Clothes'
CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR); CREATE TABLE Customers (customer_id VARCHAR, payment_method_code VARCHAR, customer_code VARCHAR, customer_name VARCHAR, customer_address VARCHAR, customer_phone VARCHAR, customer_email VARCHAR); CREATE TABLE Customer_Addresses (customer_id VARCHAR, a...
[ [ "9" ] ]
vd_spider_department_store_4
spider_department_store
Spider
How many staff members are female?
Staff gender is encoded as a boolean string: '1' for male and '0' for female. Filtering on 'F' or 'Female' returns 0.
SELECT COUNT(*) FROM Staff WHERE staff_gender = '0'
CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR); CREATE TABLE Customers (customer_id VARCHAR, payment_method_code VARCHAR, customer_code VARCHAR, customer_name VARCHAR, customer_address VARCHAR, customer_phone VARCHAR, customer_email VARCHAR); CREATE TABLE Customer_Addresses (customer_id VARCHAR, a...
[ [ "1" ] ]
vd_spider_cre_theme_park_1
spider_cre_theme_park
Spider
How many five-star hotels are there?
Star rating is stored as the digit string (e.g. '5'), not the word 'five' or 'Five Star'
SELECT COUNT(*) FROM Hotels WHERE star_rating_code = '5'
CREATE TABLE Features (Feature_ID VARCHAR, Feature_Details VARCHAR); CREATE TABLE Hotels (hotel_id VARCHAR, star_rating_code VARCHAR, pets_allowed_yn VARCHAR, price_range VARCHAR, other_hotel_details VARCHAR); CREATE TABLE Locations (Location_ID VARCHAR, Location_Name VARCHAR, Address VARCHAR, Other_Details VARCHAR); C...
[ [ "9" ] ]
vd_spider_cre_theme_park_2
spider_cre_theme_park
Spider
How many hotels allow pets?
pets_allowed_yn uses '1' for yes (boolean encoded as char), not 'Y' or 'yes'
SELECT COUNT(*) FROM Hotels WHERE pets_allowed_yn = '1'
CREATE TABLE Features (Feature_ID VARCHAR, Feature_Details VARCHAR); CREATE TABLE Hotels (hotel_id VARCHAR, star_rating_code VARCHAR, pets_allowed_yn VARCHAR, price_range VARCHAR, other_hotel_details VARCHAR); CREATE TABLE Locations (Location_ID VARCHAR, Location_Name VARCHAR, Address VARCHAR, Other_Details VARCHAR); C...
[ [ "13" ] ]
vd_spider_cre_theme_park_3
spider_cre_theme_park
Spider
How many tourist attractions are classified as museums?
The museum type is stored as code '9' in Attraction_Type_Code (requires joining Ref_Attraction_Types or inspecting data); naive text 'museum' fails
SELECT COUNT(*) FROM Tourist_Attractions WHERE Attraction_Type_Code = '9'
CREATE TABLE Features (Feature_ID VARCHAR, Feature_Details VARCHAR); CREATE TABLE Hotels (hotel_id VARCHAR, star_rating_code VARCHAR, pets_allowed_yn VARCHAR, price_range VARCHAR, other_hotel_details VARCHAR); CREATE TABLE Locations (Location_ID VARCHAR, Location_Name VARCHAR, Address VARCHAR, Other_Details VARCHAR); C...
[ [ "3" ] ]
vd_spider_college_2_1
spider_college_2
Spider
How many grade records correspond to a plain A (not A+ or A-)?
Plain A is stored as 'A ' (A followed by a trailing space), not 'A'; querying exact 'A' returns zero
SELECT COUNT(*) FROM takes WHERE grade = 'A '
CREATE TABLE advisor (s_ID VARCHAR, i_ID VARCHAR); CREATE TABLE classroom (building VARCHAR, room_number VARCHAR, capacity VARCHAR); CREATE TABLE course (course_id VARCHAR, title VARCHAR, dept_name VARCHAR, credits VARCHAR); CREATE TABLE department (dept_name VARCHAR, building VARCHAR, budget VARCHAR); CREATE TABLE ins...
[ [ "3318" ] ]
vd_spider_college_2_2
spider_college_2
Spider
How many courses are offered by the Computer Science department?
Computer Science is stored as abbreviated 'Comp. Sci.' (with periods and space), not the full name
SELECT COUNT(*) FROM course WHERE dept_name = 'Comp. Sci.'
CREATE TABLE advisor (s_ID VARCHAR, i_ID VARCHAR); CREATE TABLE classroom (building VARCHAR, room_number VARCHAR, capacity VARCHAR); CREATE TABLE course (course_id VARCHAR, title VARCHAR, dept_name VARCHAR, credits VARCHAR); CREATE TABLE department (dept_name VARCHAR, building VARCHAR, budget VARCHAR); CREATE TABLE ins...
[ [ "10" ] ]
vd_spider_college_2_3
spider_college_2
Spider
How many time slots meet on Thursdays?
Thursday is encoded as single letter 'R' (common academic scheduling abbreviation), not 'Th' or 'Thu'
SELECT COUNT(*) FROM time_slot WHERE day = 'R'
CREATE TABLE advisor (s_ID VARCHAR, i_ID VARCHAR); CREATE TABLE classroom (building VARCHAR, room_number VARCHAR, capacity VARCHAR); CREATE TABLE course (course_id VARCHAR, title VARCHAR, dept_name VARCHAR, credits VARCHAR); CREATE TABLE department (dept_name VARCHAR, building VARCHAR, budget VARCHAR); CREATE TABLE ins...
[ [ "2" ] ]
vd_spider_college_3_1
spider_college_3
Spider
How many faculty members hold the rank of Associate Professor?
Associate Professor is stored as concatenated abbreviation 'AssocProf' (no space/period), not 'Associate Professor' or 'Assoc. Prof.'
SELECT COUNT(*) FROM Faculty WHERE Rank = 'AssocProf'
CREATE TABLE Course (CID VARCHAR, CName VARCHAR, Credits VARCHAR, Instructor VARCHAR, Days VARCHAR, Hours VARCHAR, DNO VARCHAR); CREATE TABLE Department (DNO VARCHAR, Division VARCHAR, DName VARCHAR, Room VARCHAR, Building VARCHAR, DPhone VARCHAR); CREATE TABLE Enrolled_in (StuID VARCHAR, CID VARCHAR, Grade VARCHAR); C...
[ [ "8" ] ]
vd_spider_college_3_2
spider_college_3
Spider
How many students are majoring in Computer Science?
Major is stored as the department number code ('600' for Computer Science), not the department name string
SELECT COUNT(*) FROM Student WHERE Major = '600'
CREATE TABLE Course (CID VARCHAR, CName VARCHAR, Credits VARCHAR, Instructor VARCHAR, Days VARCHAR, Hours VARCHAR, DNO VARCHAR); CREATE TABLE Department (DNO VARCHAR, Division VARCHAR, DName VARCHAR, Room VARCHAR, Building VARCHAR, DPhone VARCHAR); CREATE TABLE Enrolled_in (StuID VARCHAR, CID VARCHAR, Grade VARCHAR); C...
[ [ "18" ] ]
vd_spider_e_government_1
spider_e_government
Spider
How many party form submissions have been fully completed?
Completed status is stored as title-case 'Completed', not uppercase 'COMPLETED' or lowercase 'completed'
SELECT COUNT(*) FROM Party_Forms WHERE form_status_code = 'Completed'
CREATE TABLE Addresses (address_id VARCHAR, line_1_number_building VARCHAR, town_city VARCHAR, zip_postcode VARCHAR, state_province_county VARCHAR, country VARCHAR); CREATE TABLE Forms (form_id VARCHAR, form_type_code VARCHAR, service_id VARCHAR, form_number VARCHAR, form_name VARCHAR, form_description VARCHAR); CREATE...
[ [ "2" ] ]
vd_spider_e_government_2
spider_e_government
Spider
How many parties pay by direct debit?
Direct Debit is stored as two title-case words 'Direct Debit' (with space), not 'direct debit' or 'DirectDebit'
SELECT COUNT(*) FROM Parties WHERE payment_method_code = 'Direct Debit'
CREATE TABLE Addresses (address_id VARCHAR, line_1_number_building VARCHAR, town_city VARCHAR, zip_postcode VARCHAR, state_province_county VARCHAR, country VARCHAR); CREATE TABLE Forms (form_id VARCHAR, form_type_code VARCHAR, service_id VARCHAR, form_number VARCHAR, form_name VARCHAR, form_description VARCHAR); CREATE...
[ [ "2" ] ]
vd_spider_behavior_monitoring_1
spider_behavior_monitoring
Spider
How many behavior incidents were of the violence type?
incident_type_code stores uppercase identifiers: 'VIOLENCE', 'NOISE', 'DISTURB' — naive lowercase 'violence' returns nothing
SELECT COUNT(*) FROM Behavior_Incident WHERE incident_type_code = 'VIOLENCE'
CREATE TABLE Addresses (address_id VARCHAR, line_1 VARCHAR, line_2 VARCHAR, line_3 VARCHAR, city VARCHAR, zip_postcode VARCHAR, state_province_county VARCHAR, country VARCHAR, other_address_details VARCHAR); CREATE TABLE Assessment_Notes (notes_id VARCHAR, student_id VARCHAR, teacher_id VARCHAR, date_of_notes VARCHAR, ...
[ [ "6" ] ]
vd_spider_behavior_monitoring_2
spider_behavior_monitoring
Spider
How many detentions were of the 'during break time' type?
The break-time detention type code is 'BREAK ' (6 characters, with a trailing space). 'BREAK' without the space returns 0 rows.
SELECT COUNT(*) FROM Detention WHERE detention_type_code = 'BREAK '
CREATE TABLE Addresses (address_id VARCHAR, line_1 VARCHAR, line_2 VARCHAR, line_3 VARCHAR, city VARCHAR, zip_postcode VARCHAR, state_province_county VARCHAR, country VARCHAR, other_address_details VARCHAR); CREATE TABLE Assessment_Notes (notes_id VARCHAR, student_id VARCHAR, teacher_id VARCHAR, date_of_notes VARCHAR, ...
[ [ "6" ] ]
vd_spider_behavior_monitoring_3
spider_behavior_monitoring
Spider
How many male teachers are there?
gender is encoded as '1' (male) and '0' (female), not the expected 'M'/'F' letters. Naive 'M' returns 0.
SELECT COUNT(*) FROM Teachers WHERE gender = '1'
CREATE TABLE Addresses (address_id VARCHAR, line_1 VARCHAR, line_2 VARCHAR, line_3 VARCHAR, city VARCHAR, zip_postcode VARCHAR, state_province_county VARCHAR, country VARCHAR, other_address_details VARCHAR); CREATE TABLE Assessment_Notes (notes_id VARCHAR, student_id VARCHAR, teacher_id VARCHAR, date_of_notes VARCHAR, ...
[ [ "10" ] ]
vd_spider_cre_doc_control_systems_1
spider_cre_doc_control_systems
Spider
How many documents currently have an overdue status?
document_status_code stores lowercase values: 'overdue', 'done', 'working'. Naive 'Overdue' (capitalized) returns 0.
SELECT COUNT(*) FROM Documents WHERE document_status_code = 'overdue'
CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR); CREATE TABLE Circulation_History (document_id VARCHAR, draft_number VARCHAR, copy_number VARCHAR, employee_id VARCHAR); CREATE TABLE Documents (document_id VARCHAR, document_status_code VARCHAR, document_type_code VARCHAR, shipping_agent_code VARCHAR...
[ [ "4" ] ]
vd_spider_cre_doc_control_systems_2
spider_cre_doc_control_systems
Spider
How many documents were shipped via FedEx?
FedEx is stored as the 2-letter code 'FE' in shipping_agent_code, not the full name 'FedEx'. Naive 'FedEx' returns 0.
SELECT COUNT(*) FROM Documents WHERE shipping_agent_code = 'FE'
CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR); CREATE TABLE Circulation_History (document_id VARCHAR, draft_number VARCHAR, copy_number VARCHAR, employee_id VARCHAR); CREATE TABLE Documents (document_id VARCHAR, document_status_code VARCHAR, document_type_code VARCHAR, shipping_agent_code VARCHAR...
[ [ "4" ] ]
vd_spider_cre_doc_control_systems_3
spider_cre_doc_control_systems
Spider
How many employees have the editor role?
Editor role is stored as the 2-letter code 'ED', not 'Editor'. Naive 'Editor' returns 0.
SELECT COUNT(*) FROM Employees WHERE role_code = 'ED'
CREATE TABLE Addresses (address_id VARCHAR, address_details VARCHAR); CREATE TABLE Circulation_History (document_id VARCHAR, draft_number VARCHAR, copy_number VARCHAR, employee_id VARCHAR); CREATE TABLE Documents (document_id VARCHAR, document_status_code VARCHAR, document_type_code VARCHAR, shipping_agent_code VARCHAR...
[ [ "2" ] ]
vd_spider_cre_doc_tracking_db_1
spider_cre_doc_tracking_db
Spider
How many documents are of the book type?
Book type is stored as the 2-letter code 'BK', not 'Book'. Naive 'Book' returns 0.
SELECT COUNT(*) FROM All_Documents WHERE Document_Type_Code = 'BK'
CREATE TABLE All_Documents (Document_ID VARCHAR, Date_Stored VARCHAR, Document_Type_Code VARCHAR, Document_Name VARCHAR, Document_Description VARCHAR, Other_Details VARCHAR); CREATE TABLE Documents_to_be_Destroyed (Document_ID VARCHAR, Destruction_Authorised_by_Employee_ID VARCHAR, Destroyed_by_Employee_ID VARCHAR, Pla...
[ [ "5" ] ]
vd_spider_cre_doc_tracking_db_2
spider_cre_doc_tracking_db
Spider
How many document location records are for documents stored in Xiamen?
Xiamen is stored as the single lowercase letter 'x' in Location_Code. Naive 'Xiamen' returns 0.
SELECT COUNT(*) FROM Document_Locations WHERE Location_Code = 'x'
CREATE TABLE All_Documents (Document_ID VARCHAR, Date_Stored VARCHAR, Document_Type_Code VARCHAR, Document_Name VARCHAR, Document_Description VARCHAR, Other_Details VARCHAR); CREATE TABLE Documents_to_be_Destroyed (Document_ID VARCHAR, Destruction_Authorised_by_Employee_ID VARCHAR, Destroyed_by_Employee_ID VARCHAR, Pla...
[ [ "5" ] ]
vd_tpcds_sf001_1
tpcds_sf001
TPC-DS
How many customer demographic records belong to divorced customers?
cd_marital_status uses single-letter codes: 'D'=Divorced, 'M'=Married, 'S'=Single, 'W'=Widowed, 'U'=Unknown. Naive 'divorced' (lowercase) returns 0.
SELECT COUNT(*) FROM customer_demographics WHERE cd_marital_status = 'D'
CREATE TABLE call_center (cc_call_center_sk BIGINT, cc_call_center_id VARCHAR, cc_rec_start_date DATE, cc_rec_end_date DATE, cc_closed_date_sk BIGINT, cc_open_date_sk BIGINT, cc_name VARCHAR, cc_class VARCHAR, cc_employees BIGINT, cc_sq_ft BIGINT, cc_hours VARCHAR, cc_manager VARCHAR, cc_mkt_id BIGINT, cc_mkt_class VAR...
[ [ "3842" ] ]
vd_tpcds_sf001_2
tpcds_sf001
TPC-DS
How many customers are marked as preferred customers?
c_preferred_cust_flag uses single-character string 'Y'/'N' flags, not boolean true/1/yes. Naive 'yes' returns 0.
SELECT COUNT(*) FROM customer WHERE c_preferred_cust_flag = 'Y'
CREATE TABLE call_center (cc_call_center_sk BIGINT, cc_call_center_id VARCHAR, cc_rec_start_date DATE, cc_rec_end_date DATE, cc_closed_date_sk BIGINT, cc_open_date_sk BIGINT, cc_name VARCHAR, cc_class VARCHAR, cc_employees BIGINT, cc_sq_ft BIGINT, cc_hours VARCHAR, cc_manager VARCHAR, cc_mkt_id BIGINT, cc_mkt_class VAR...
[ [ "480" ] ]

Cleo Value-Discovery Benchmark

A small (66-question), held-out benchmark for a failure mode that ordinary text-to-SQL evaluations miss: questions whose correct SQL depends on a literal that lives in the data, not the schema.

The schema tells you a column is named status; only the data reveals its values are {'O','C','X'}. The schema shows to_date; only the data reveals that "current" is encoded as the sentinel '9999-01-01'. A one-shot text-to-SQL model has to guess these literals, and a wrong guess returns the wrong rows — often silently (an empty result, or a plausible-but-wrong count). This benchmark isolates that gap: a model must discover the value (by inspecting the data) to answer correctly.

It is the evaluation suite used to measure dreeseaw/cleo, a 2B tool-using SQL analyst. On this suite a one-shot baseline scores 13.6%; the tool-using model scores 51.5%.

What's in each row

field description
id unique question id
db_id source database identifier
source upstream database the schema comes from (see Provenance)
question the natural-language question
convention the value-discovery annotation — the real stored value/code/convention the answer hinges on (e.g. "Current assignment is indicated by to_date = '9999-01-01'")
gold_sql reference read-only SQL
schema_ddl CREATE TABLE DDL for the tables involved (self-contained)
canonical_rows the gold answer (denotation) — execute gold_sql and you should get these rows

How to use it

Score by denotation, not string match: run a model's SQL and the gold_sql, compare the row-sets (order-insensitive). A prediction is correct iff it returns the same rows as canonical_rows.

from datasets import load_dataset
ds = load_dataset("dreeseaw/cleo-value-discovery", split="train")
ex = ds[0]
print(ex["question"])      # "How many employees are currently assigned to each department?"
print(ex["convention"])    # "Current assignment is indicated by to_date = '9999-01-01' ..."
print(ex["gold_sql"])

The convention field is provided for analysis (it's the thing a model must discover) — do not feed it to the model if you're measuring value-discovery.

Provenance & attribution

The questions, the convention annotations, and the gold SQL are original to this benchmark. The database schemas are derived from public datasets and are referenced, not redistributed wholesale — only the small CREATE TABLE DDL and the gold answer rows are included:

source questions
Spider 35
seaborn-data 12
AdventureWorksLT (Microsoft sample) 5
MySQL employees sample DB 4
MySQL world sample DB 4
TPC-H 4
TPC-DS 2

This benchmark contains no SynSQL data. (SynSQL was used elsewhere in Cleo's training; it is referenced there, not copied, and none of it appears here.)

License

Released under CC BY-SA 4.0, the share-alike license of the largest upstream source (Spider). Please attribute both this benchmark and the upstream schema sources above.

Citation

@misc{cleo_value_discovery_2026,
  title  = {Cleo Value-Discovery Benchmark},
  author = {Dreeseaw},
  year   = {2026},
  url    = {https://huggingface.co/datasets/dreeseaw/cleo-value-discovery}
}
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