SQL sum with condition

Question

I currently have a large SQL statement which i add the following line to in order to get the total cash for each transaction ID (which are unique):

select su         


        

Answer 1

With condition HAVING you will eliminate data with cash not ultrapass 0 if you want, generating more efficiency in your query.

SELECT SUM(cash) AS money FROM Table t1, Table2 t2 WHERE t1.branch = t2.branch 
AND t1.transID = t2.transID
AND ValueDate > @startMonthDate HAVING money > 0;