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Prove the following identity: sid, sname sid, sname, bookno s X o bookno 2007 (6)) n Tsid, sname bookno (s xb). sid=t. sida t.bookno=b.bookno a

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Prove the following identity: "sid, sname sid, sname, bookno s X o bookno 2007 (6)) n Tsid, sname bookno (s xb). sid=t. sida t.bookno=b.bookno a price O bookno-2007 ^ price O bookno-2007 ^ price

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