sqlite

SQLite Compound Subquery

Subquery optimization in SQLite.

SELECT * FROM tracks WHERE GenreId IN (SELECT GenreId FROM genres WHERE Name = "Rock");

SQLite flattens this subquery into a join-like structure, searching genres first then lookups in tracks using the index.

Interactive Execution Plan

EXPLAIN Output

Run: EXPLAIN QUERY PLAN your_query;

Enter SQL EXPLAIN output to visualizeSupports PostgreSQL EXPLAIN ANALYZE, MySQL EXPLAIN, and SQLite EXPLAIN QUERY PLAN formats