What is the difference between primary and candidate key?
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can any one tell me how i can start database testing mean what should be initial point and how i can write a query for listing page of any item thanks in advance
What is the differnce between Order by and Group by
I have single column in a file. Input 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 my output is file 1 have 1,2,3,10,11,12 file 2 have 4,5,6,13,14,15 and file 3 have 7,8,9 how is it possible in datastage
What is the candidate key used for?
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Data structure used to implements a menu:
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