When troubleshooting performance issues in SQL Server,one of the more common mistakes I come across are mismatched datatypes in predicates. This can cause a huge hit in performance and sometimes it won’t make a difference at all. Check out my sample code below, and watch out for IMPLICIT_CONVERSION !!! /Step 1 – Run this to […]

output clause

SQL Server 2005 introduced the OUTPUT clause which has the ability to access the INSERTED and DELETED tables during DML actions. The OUTPUT clause can be added to your T-SQL scripts to write modified row data out to a table or return data back to the client. The OUTPUT clause can be used for auditing and […]