Question

I have to create a pl/sql function which takes seven input parameters.

Problem is user can pass any of these parameters, in any combination such that remaining parameters would be null. Thus a number of combinations is possible. And I have to query a table using these parameters after removing null parameters.

Is there a way to do this without using number of nested ifs for checking null values?

Answer 1

Also inculde checking the input parameters is null or not in the WHERE clause

For example , suppose the input parameters are parameter1 , parameter2 ,parameter3

select * from tableA
where (col1 = parameter1 or parameter1  is null)
and (col2 = parameter2 or parameter2  is null)
and (col3 = parameter3 or parameter3  is null)

If the parameter1 is null , it will always return true for this parameter ‘s conditon.