Schema:
CREATE TABLE Customer_Master_Index (
master_customer_id INTEGER NOT NULL,
cmi_details VARCHAR(255),
PRIMARY KEY (master_customer_id)
);
CREATE TABLE CMI_Cross_References (
cmi_cross_ref_id INTEGER NOT NULL,
master_customer_id INTEGER NOT NULL,
source_system_code CHAR(15) NOT NULL,
PRIMARY KEY (cmi_cross_ref_id),
FOREIGN KEY (master_customer_id) REFERENCES Customer_Master_Index (master_customer_id)

);
CREATE TABLE Council_Tax (
council_tax_id INTEGER NOT NULL,
cmi_cross_ref_id INTEGER NOT NULL,
PRIMARY KEY (council_tax_id),
FOREIGN KEY (cmi_cross_ref_id) REFERENCES CMI_Cross_References (cmi_cross_ref_id)
);
CREATE TABLE Business_Rates (
business_rates_id INTEGER NOT NULL,
cmi_cross_ref_id INTEGER NOT NULL,
PRIMARY KEY (business_rates_id),
FOREIGN KEY (cmi_cross_ref_id) REFERENCES CMI_Cross_References (cmi_cross_ref_id)
);
CREATE TABLE Benefits_Overpayments (
council_tax_id INTEGER NOT NULL,
cmi_cross_ref_id INTEGER NOT NULL,
PRIMARY KEY (council_tax_id),
FOREIGN KEY (cmi_cross_ref_id) REFERENCES CMI_Cross_References (cmi_cross_ref_id)
);
CREATE TABLE Parking_Fines (
council_tax_id INTEGER NOT NULL,
cmi_cross_ref_id INTEGER NOT NULL,
PRIMARY KEY (council_tax_id),
FOREIGN KEY (cmi_cross_ref_id) REFERENCES CMI_Cross_References (cmi_cross_ref_id)
);
CREATE TABLE Rent_Arrears (
council_tax_id INTEGER NOT NULL,
cmi_cross_ref_id INTEGER NOT NULL,
PRIMARY KEY (council_tax_id),
FOREIGN KEY (cmi_cross_ref_id) REFERENCES CMI_Cross_References (cmi_cross_ref_id)
);
CREATE TABLE Electoral_Register (
electoral_register_id INTEGER NOT NULL,
cmi_cross_ref_id INTEGER NOT NULL,
PRIMARY KEY (electoral_register_id),
FOREIGN KEY (cmi_cross_ref_id) REFERENCES CMI_Cross_References (cmi_cross_ref_id)
);

Question: what are the details of the cmi masters that have the cross reference code 'Tax'?
SQL:
SELECT T1.cmi_details FROM Customer_Master_Index AS T1 JOIN CMI_Cross_References AS T2 ON T1.master_customer_id  =  T2.master_customer_id WHERE T2.source_system_code  =  'Tax'

Question: What is the cmi cross reference id that is related to at least one council tax entry? List the cross reference id and source system code.
SQL:
SELECT T1.cmi_cross_ref_id ,  T1.source_system_code FROM CMI_Cross_References AS T1 JOIN Council_Tax AS T2 ON T1.cmi_cross_ref_id  =  T2.cmi_cross_ref_id GROUP BY T1.cmi_cross_ref_id HAVING count(*)  >=  1

Question: How many business rates are related to each cmi cross reference? List cross reference id, master customer id and the n
SQL:
SELECT T2.cmi_cross_ref_id ,  T2.master_customer_id ,  count(*) FROM Business_Rates AS T1 JOIN CMI_Cross_References AS T2 ON T1.cmi_cross_ref_id  =  T2.cmi_cross_ref_id GROUP BY T2.cmi_cross_ref_id

Question: What is the tax source system code related to the benefits and overpayments? List the code and the benifit id, order by benifit id.
SQL:
SELECT T1.source_system_code ,  T2.council_tax_id FROM CMI_Cross_References AS T1 JOIN Benefits_Overpayments AS T2 ON T1.cmi_cross_ref_id  =  T2.cmi_cross_ref_id ORDER BY T2.council_tax_id

Question: Wat is the tax source system code and master customer id of the taxes related to each parking fine id?
SQL:
SELECT T1.source_system_code ,  T1.master_customer_id ,  T2.council_tax_id FROM CMI_Cross_References AS T1 JOIN Parking_Fines AS T2 ON T1.cmi_cross_ref_id  =  T2.cmi_cross_ref_id

Question: What are the renting arrears tax ids related to the customer master index whose detail is not 'Schmidt, Kertzmann and Lubowitz'?
SQL:
SELECT T1.council_tax_id FROM Rent_Arrears AS T1 JOIN CMI_Cross_References AS T2 ON T1.cmi_cross_ref_id  =  T2.cmi_cross_ref_id JOIN Customer_Master_Index AS T3 ON T3.master_customer_id  =  T2.master_customer_id WHERE T3.cmi_details != 'Schmidt ,  Kertzmann and Lubowitz'

Question: What are the register ids of electoral registries that have the cross reference source system code 'Electoral' or 'Tax'?
SQL:
SELECT T1.electoral_register_id FROM Electoral_Register AS T1 JOIN CMI_Cross_References AS T2 ON T1.cmi_cross_ref_id  =  T2.cmi_cross_ref_id WHERE T2.source_system_code  =  'Electoral' OR T2.source_system_code  =  'Tax'

Question: How many different source system code for the cmi cross references are there?
SQL:
SELECT count(DISTINCT source_system_code) FROM CMI_cross_references

Question: List all information about customer master index, and sort them by details in descending order.
SQL:
SELECT * FROM customer_master_index ORDER BY cmi_details DESC

Question: List the council tax ids and their related cmi cross references of all the parking fines.
SQL:
SELECT council_tax_id ,  cmi_cross_ref_id FROM parking_fines

Question: How many council taxes are collected for renting arrears ?
SQL:
SELECT count(*) FROM rent_arrears

Question: What are the distinct cross reference source system codes which are related to the master customer details 'Gottlieb, Becker and Wyman'?
SQL:
SELECT DISTINCT T2.source_system_code FROM customer_master_index AS T1 JOIN cmi_cross_references AS T2 ON T1.master_customer_id  =  T2.master_customer_id WHERE T1.cmi_details  =  'Gottlieb ,  Becker and Wyman'

Question: Which cmi cross reference id is not related to any parking taxes?
SQL:
SELECT cmi_cross_ref_id FROM cmi_cross_references EXCEPT SELECT cmi_cross_ref_id FROM parking_fines

Question: Which distinct source system code includes the substring 'en'?
SQL:
SELECT DISTINCT source_system_code FROM cmi_cross_references WHERE source_system_code LIKE '%en%'