ROW_NUMBER(), RANK(), DENSE_RANK()

What do you mean by ROW_NUMBER(), RANK(), DENSE_RANK() differentiate them?

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asit

  • Jun 9th, 2012
 

THE BELOW FUNCTIONS ARE OLAP FUNCTIONS...

rank() function skips the continuity but dense_rank() function gives the sequence.It is always advised to use dense_rank for viewing nth highest/lowest value. row_num() gives the serial no in the order how they are inserted in to a table.

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