Define primary and unique key?
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What do you understand by aggregation and atomicity?
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IF Statements BLOCK 1 . IF a >= b THEN do_this …..; ELSE do_that….; END IF BLOCK 2 . IF a < b THEN do_that …..; ELSE do_this….; END IF; • Given any pair of non-NULL values for “a” and”b”, will Block 1 and Block 2 do the same thing? • What if either “a” or”b” (or both) is NULL?
What are the different types of keys in database?
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2 Answers Capital IQ, TCS, WNS,
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What do you understand by unique key?
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