What the hell this query do!?
SELECT student.name FROM student
WHERE not exists(
SELECT *
FROM enrollment
WHERE not exists(
SELECT *
FROM class
WHERE
class.name = enrollment.classname
AND
enrollment.studentnumber = student.sid
)
)
It returns the name of the students which are enrolled in a class?
I need to know what returns in order to translate it into SQL that mysql can
parse...
Any help would be appreciated!
Roberto Ramírez
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