EXERCISES
C.1 Give SQL versions of constraints EQD2 and EQD3 from the section CONSTRAINTS in the body of the appendix.
C.2 Give an SQL version of the Tutorial D expression near the end of the section Queries in the body of the appendix.
C.3 Why would it be incorrect to specify CORRESPONDING on the EXCEPT in the final portion of the SQL expression at the end of the section immediately preceding these exercises?
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