Question

Query

    DELETE FROM TEMPSchedules 
           WHERE StudentID = ( Select StudentID 
                               From Students 
                               Where Ref = 'H1007')

Error Message

Subquery returned more than 1 value. This is not permitted when the
subquery follows =, !=, <, <= , >, >= or when the subquery is used as
an expression.

Problem

Now the problem is that each “Ref Group” has more than 1 Student attached to it. So how should I deal with this.
Thanks

Answer 1

  DELETE FROM TEMPSchedules 
           WHERE StudentID  in ( Select distinct StudentID 
                               From Students 
                               Where Ref = 'H1007')