SQL Statement - How can Improve speed with indexing

Question

I have a script that has to look throught over 2.5 million records to find if a member that has an unread email. I want to know what can be done to improve its speed. Curr

Answer 1

Get the Actual Query Plan by (CTRL+M) in SSMS. Or paste your query in SSMS, right click it, select Analyze query in database engine tuning advisor, your will see what index you need to add. Basically, you need an composite+include index.