The relational operators have the property of _____; that is, the use of relational algebra operators on existing relations (tables) produces new relations.
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Q48: _ is the real power behind the
Q49: A table is also called a(n) _
Q50: In a database context, a(n) _ indicates
Q51: A(n) _ is an orderly arrangement used
Q52: To avoid nulls, some designers use special
Q54: PRODUCT yields all possible pairs of rows
Q55: A(n) _ provides a detailed description of
Q56: The _ relationship should be rare in
Q57: According to Codd's _ rule of relational
Q58: In a relational model, _ are used
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