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If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.
I need help with a subquery!
SELECT a.slname as LastName, a.sfname as FirstName, b.cname as CoureTitle, c.grade as Grade
FROM banerjee.student a, banerjee.course b, banerjee.enrollment c, banerjee.course_section d
WHERE c.grade is NOT NULL
AND a.sid = c.sid
AND c.csecid = d.csecid
AND d.cid = b.cid;