How to improve performance of non-deterministic function of a column in a where clause or join?

Question

I would like to improve the performance of a query, which does has a where clause with a non-deterministic function call.

Select Count(*) 
From table1
Where         


        

Answer 1

Have you tried to use the Local Temporary Table to first insert all the required records ? Finally, do the calculations on temporary table and return it.