Database: products_gen_characteristics

Question: Count the products that have the color description "white" or have the characteristic name "hot".
SQL: SELECT count(*) FROM products AS t1 JOIN product_characteristics AS t2 ON t1.product_id  =  t2.product_id JOIN CHARACTERISTICS AS t3 ON t2.characteristic_id  =  t3.characteristic_id JOIN ref_colors AS t4 ON t1.color_code  =  t4.color_code WHERE t4.color_description  =  "white" OR t3.characteristic_name  =  "hot"

Question: What is the unit of measurement of product named "cumin"?
SQL: SELECT t2.unit_of_measure FROM products AS t1 JOIN ref_product_categories AS t2 ON t1.product_category_code  =  t2.product_category_code WHERE t1.product_name  =  "cumin"

Question: Find the unit of measurement and product category code of product named "chervil".
SQL: SELECT t2.unit_of_measure ,  t2.product_category_code FROM products AS t1 JOIN ref_product_categories AS t2 ON t1.product_category_code  =  t2.product_category_code WHERE t1.product_name  =  "chervil"

Question: Find the product names that are colored 'white' but do not have unit of measurement "Handful".
SQL: SELECT t1.product_name FROM products AS t1 JOIN ref_product_categories AS t2 ON t1.product_category_code  =  t2.product_category_code JOIN ref_colors AS t3 ON t1.color_code  =  t3.color_code WHERE t3.color_description  =  "white" AND t2.unit_of_measure != "Handful"

Question: What is the description of the color for most products?
SQL: SELECT t2.color_description FROM products AS t1 JOIN ref_colors AS t2 ON t1.color_code  =  t2.color_code GROUP BY t2.color_description ORDER BY count(*) DESC LIMIT 1

Question: What is the description of the color used by least products?
SQL: SELECT t2.color_description FROM products AS t1 JOIN ref_colors AS t2 ON t1.color_code  =  t2.color_code GROUP BY t2.color_description ORDER BY count(*) ASC LIMIT 1

Question: What is the characteristic name used by most number of the products?
SQL: SELECT t3.characteristic_name FROM products AS t1 JOIN product_characteristics AS t2 ON t1.product_id  =  t2.product_id JOIN CHARACTERISTICS AS t3 ON t2.characteristic_id  =  t3.characteristic_id GROUP BY t3.characteristic_name ORDER BY count(*) DESC LIMIT 1

Question: What are the names, details and data types of the characteristics which are never used by any product?
SQL: SELECT characteristic_name ,  other_characteristic_details ,  characteristic_data_type FROM CHARACTERISTICS EXCEPT SELECT t1.characteristic_name ,  t1.other_characteristic_details ,  t1.characteristic_data_type FROM CHARACTERISTICS AS t1 JOIN product_characteristics AS t2 ON t1.characteristic_id  =  t2.characteristic_id

Question: What are characteristic names used at least twice across all products?
SQL: SELECT t3.characteristic_name FROM products AS t1 JOIN product_characteristics AS t2 ON t1.product_id  =  t2.product_id JOIN CHARACTERISTICS AS t3 ON t2.characteristic_id  =  t3.characteristic_id GROUP BY t3.characteristic_name HAVING count(*)  >= 2