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Explain A Relation Schema And A Relation? |
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Answer» A RELATION Schema DENOTED by R(A1, A2, ?, An) is made up of the relation name R and the list of attributes AI that it contains. A relation is defined as a set of tuples. Let 'r' be the relation which contains set tuples (t1, t2, t3, ..., tn). Each tuple is an ordered list of n-values t=(v1,v2, ..., vn). A relation Schema denoted by R(A1, A2, ?, An) is made up of the relation name R and the list of attributes Ai that it contains. A relation is defined as a set of tuples. Let 'r' be the relation which contains set tuples (t1, t2, t3, ..., tn). Each tuple is an ordered list of n-values t=(v1,v2, ..., vn). |
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