Inside SQLite’s Frontend: Join Table Ordering

Hello, I'm Maneshwar. I'm building git-lrc, an AI code reviewer that runs on every commit. It is free, unlimited, and source-available on Github. Star Us to help devs discover the project. Do give it a try and share your feedback for improving the product. Even if your WHERE clause is perfectly optimized, a bad join order can still make your query slow. How SQLite Executes Joins SQLite uses a very simple but effective strategy for joins. It always executes joins as nested loops. That means for a query like: SELECT * FROM A JOIN B; SQLite will do something like: for each row in A: for each row in B: process the combination The important detail here is that the order of tables determines how these loops are nested. The first table becomes the outer loop The last table becomes the inner loop So the order in your FROM clause directly affects execution. Why Order Matters Nested loops can be very expensive if the outer loop has too many rows. For example, if table A has 1 million rows and ta