1.

If D1, D2,..Dn are domains in a relational model, then the relation is a table, which is a subset of

A. D1+D2+ ' +Dn
B. D1xD2x ' xDn
C. D1UD2U ' UDn
D. D1-D2- ' -Dn
Answer» C. D1UD2U ' UDn


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