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equivalence-rules

GATE CSE & IT · Query Processing · 1998-1998

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Korth — Database System Concepts

Relational model, SQL, normalization, transactions

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1998 PYQ

Which of the following query transformations (i.e. replacing the l.h.s. expression by the r.h.s. expression) is incorrect? R 1 and R 2 are relations, C 1 , C 2 are selection condit...

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