I like these questions a lot more than making 'SQL puzzles', just by showing bad code. Your question is a typical sample of what I run into daily. Every DBA should use ISNULL in their queries, I guess that's the lesson for today 🙂
Ronald HensbergenHelp us, help yourself... Post data so we can read and use it: http://www.sqlservercentral.com/articles/Best+Practices/61537/-------------------------------------------------------------------------2+2=5 for significant large values of 2