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Developer-C 11.1
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CREATE TABLE transaction ( Id int NOT NULL AUTO_INCREMENT, Name varchar(50), Price int, PRIMARY KEY (Id) ); INSERT into transaction (Name, Price) VALUES ('Apple', 5); INSERT into transaction (Name, Price) VALUES ('Car Wash', 30); INSERT into transaction (Name, Price) VALUES ('Orange', 10); INSERT into transaction (Name, Price) VALUES ('Car Wash', 25); INSERT into transaction (Name, Price) VALUES ('Apple', 5); -- Without the next line, I should recieve count of '2'. INSERT into transaction (Name, Price) VALUES ('Car Wash', 0); INSERT into transaction (Name, Price) VALUES ('Car Wash', 30); -- With that line, I should recieve count of '1' SELECT * FROM transaction t1 WHERE Name LIKE '%Car Wash%' AND NOT EXISTS ( SELECT NULL FROM transaction WHERE t1.id <= id AND Name LIKE '%Car Wash%' AND Price = 0 ); SELECT COUNT(*) FROM transaction t1 WHERE Name LIKE '%Car Wash%' AND NOT EXISTS ( SELECT NULL FROM transaction WHERE t1.id <= id AND Name LIKE '%Car Wash%' AND Price = 0 );
Id
Name
Price
7
Car Wash
30
COUNT(*)
1