I am a SQL Server professional with over 30 years of experience in data modeling, SQL Server coding and internals, and ETL.
I’ve been part of the SQL Server community for many years, as a speaker and writer, and have an equally long-standing enthusiasm for Dollywood and DisneyWorld, as a self-confessed roller coaster addict.
EXISTS rather than COUNT when checking for the existence of any correlating rows that match your criteria? Does the former really offer "superior performance and readability". Louis Davidson investigates. Read more