SQL query question: SELECT … NOT IN

Question

I am sure making a silly mistake but I can\'t figure what:

In SQL Server 2005 I am trying select all customers except those who have made a reservation before 2 AM.<

Answer 1

Given it's SQL 2005, you can also try this It's similar to Oracle's MINUS command (opposite of UNION)

But I would also suggest adding the DATEPART ( hour, insertDate) column for debug

SELECT idCustomer FROM reservations 
EXCEPT
SELECT idCustomer FROM reservations WHERE DATEPART ( hour, insertDate) < 2