ORDER BY x LIMIT y Gotcha
Introduction On a production environment I was watching a query I had just made attempts at optimizing take longer and longer as days went. Usually I would look at WHERE clauses to inform me on indexes that need creating or queries that need restructuring but often overlooked ORDER BY clauses, turns out both need equal attention. Reproduction I will be using Laravel for this because of easy EXPLAIN statements provided by barryvdh/laravel-debugbar and FakerPHP that we’ll use to seed the database with lots of records....