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+1 vote
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in Databases by Junior (523 points) | 71 views
0
$2$ tuples RC and RA both work on sets and therefore remove duplicate elements.
0

it will return 2 tupples viz. DS, CN

0
but the tuples as a whole are different
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but it is projecting only attribute 'Title'
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Project title first and then check for each row.

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