How Indexes Really Work

How Indexes Really Work
Alright, we know indexes make databases faster. But why? It's not just magic; it's about efficiently navigating the way data is physically stored and reducing the amount of work the database has to do...
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How to Optimize a Slow Query

Analyze the slow execution plan with EXPLAIN Use the database’s EXPLAIN or EXPLAIN ANALYZE (PostgreSQL), EXPLAIN PLAN (Oracle), or SHOW PLAN (SQL Server) to see how the database executes the query...
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