An extra parameter for Summary function..

Why cant oracle give an extra parameter for summary function like MAX and MIN
For example
select max(salary,2)
from empWill give the second max salary...
Edited by: 884476 on Dec 19, 2012 7:13 AM
Just a thought..

Hi,
884476 wrote:
Frank Kulash wrote:
The built-in function NTH_VALUE (new in Oracle 11.2) does that.This is not an actual GROUPING function, right..?That depends on what you mean.
NTH_VALUE and GROUPING are two separate functions. MAX and GROUPING are also separate functions.
If, by "actual GROUPING function" you mean something other than a single-row function, then, yes, it is an actual grouping function. The value returned by the function can depend on all the values in the group, and not just the arguments from one row.
Are you asking if NTH_VALUE is an aggregate function? No, it is only an analytic function; it does not have an aggregate version. If you want aggregate-style results from analytic functions, then use SELECT DISTINCT.
In Oracle 9.1 (or higher) you can write a user-defined function.:)I should have said you can write a user-defined aggregate function. Starting in Oracle 7, you could write user-defined functions, but they were not generic. For example, you could write a function that returned the n-th highest sal from scott.emp, but it wouldn't return anything from hr.employees, nor could it return the n-th highest empno from scott.emp. Using dynamic SQL, you could write a fucntion where you passed a table name and a column name as well as n, and it would return the n-th highest value, as long as that column had the right datatype.

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/Edited by: user10641405 on Nov 19, 2009 8:16 AM
Edited by: user10641405 on Nov 19, 2009 8:30 AM

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