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What is the SQL equivalent of the following relational algebra expression? Proj[b](Sel[a > 5](R)) Assume the existence of a relation R(a,b,c,d) (a) Select b from R where a > 5 (b) Select a,b from R where a > 5 (c) Select a from R where b > 5 (d) Select b from R where a > (select max(b) from R) (e) None of the above
Sagot :
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