topic · SQL

Query Optimization & EXPLAIN Plans

SQL skills for the Database Administrator (DBA) career path. Filter, model, and reason about the real data this role works with every day.

Professional Mid priority 1 Sandbox & Simulation Sandbox & Interactive Quiz

What you'll learn

SQL skills for the Database Administrator (DBA)

Building on CTEs & Subqueries, this lesson focuses on the practical SQL toolkit a working Database Administrator (DBA) reaches for on the job.

sqlperformanceexplainexecution-planindex

Sandbox preview

Try the first query

-- SQL — your first interaction
SELECT example, value
FROM sql_dataset
WHERE priority = '1'
AND career = 'Database Administrator (DBA)';

▸ preview · Sprint-2 will replace this with a live runner

Next up in this path

Indexing Strategies

Once this topic clicks, the recommended next step keeps the learning streak going on adjacent skills in the same career path.

continue path →

Build status

Sprint-1 stub

This is the Sprint-1 stub for ai.careerplane.technology.dba.sql.query-optimization. The fully-generated topic page (sandbox + quiz + AI hints + interactive tooling) lands in Sprint-2 at static/content/technology/Database Administrator (DBA)/SQL/Query Optimization & EXPLAIN Plans/index.html (per arch/memo.md → D-2026-04-22-13). The //go:embed all:static directive auto-serves it on the next container rebuild — no server-code change needed.

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