explain the ROLLUP, CUBE, RANK AND DENSE_RANK FUNCTIONS OF
ORACLE 8I
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Answer Posted / vikram
Diff between RANK() and DENSE_RANK():-
------------*******-----************-------
RANK():-
---> It leaves a gap in the sequence of ranking in the
event of tie.
DENSE_RANK():-
---> It doesn't leave a gap in the sequence of ranking
in the event of tie.
EX:-
empno ename RANK DENSE_RANK
101 AAA 1 1
102 BBB 2 2
102 BBB 2 2
102 BBB 2 2
103 CCC -->5 --> 3
103 CCC 5 3
104 DDD -->7 --> 4
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