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Raghuramkrishnan Exercise-4.3 page-127
aditi19
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May 7, 2019
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Given relation
catalog(sid, pid, cost)
Find pairs of sids such that the supplier with the first sid charges more for some part than the supplier with the second sid
what is the relational algebra expression for this?
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aditi19
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is this expression correct?
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Aditya Patel
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Yes you are correct.
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Above answer is correct
Shashwat Pandey
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