Thread: SUM function query
01-31-13, 06:21 #1Registered User
- Join Date
- Jan 2012
Unanswered: SUM function query
I am trying to solve the following exercise in order to practice my knowledge in sql. The exercise is located in: The JOIN operation - SQLZOO
and the one I am stuck with is number 13, could anybody help me out.
As far as I come out I have many different codes but all of them the editor complains is wrong.
Thanks in advance!