Query Optimization
In plain terms
Making database queries run faster and use fewer resources.
Going deeper
Query optimization improves performance through indexing, rewriting queries, and helping the planner choose efficient execution. It's key to scalable databases.
Under the hood
EXPLAIN plans reveal scans vs. index use; avoiding N+1, proper indexes, and selective columns matter.
Examples
Adding indexes, EXPLAIN analysis, rewriting joins, avoiding full scans.
Think of it like...
Like planning the fastest shopping route instead of wandering every aisle.