T-SQL Tuesday Roundup: You Know A Query’s Gonna Be Bad When…
Read OriginalThis article is a T-SQL Tuesday roundup where Brent Ozar and community members share common indicators that a SQL query is poorly written or problematic. Warning signs include WHILE loops, cursors, scalar functions in WHERE clauses, DISTINCT with multiple JOINs, old-style join syntax, and excessively long queries. The post discusses how these patterns lead to performance issues and maintenance headaches, with some commentary on AI's role in refactoring RBAR code and SQL Server's scalar function inlining limitations. It is focused on database development and T-SQL best practices.
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