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If D1,D2, ....Dn are domains in a relational model, then the relation is a table, which is a subset of | |
A. | D1ΧD2Χ ... ΧDn [Correct Answer] |
B. | D1∪D2∪... ∪Dn [Wrong Answer] |
C. | D1−D2−...−Dn [Wrong Answer] |
D. | D1+D2+... +Dn [Wrong Answer] |