Using the same parameter twice

Question

I have the following SQL query:

SELECT SUM(OpenInterest) *(SELECT DISTINCT Future
                           FROM MTM
                           WHERE Expiry = [         


        

Answer 1

I'm sure there is a proper way to do this but in the end I just made a UDF on the DB which allows me to use only 4 parameters and also certain T-SQL commands and procedures that otherwise wouldn't work. But if someone knows of a suitable alternative, please post it!