TLDR Tech / Data
From 17ms to 0.04ms: How to Design the Right SQL Index
Good SQL indexes come from real query patterns, not the table schema. Composite indexes need the right column order, usually equality filters first and sort or range columns after, with EXPLAIN ANALYZE used to verify the result. The right indexes cut example queries from 17ms to 0.04ms and 436ms to 0.5ms.
Read the full story