Inspect scans versus indexed searches.

Section: Cross-database tools

SQLite EXPLAIN QUERY PLAN

sql
sql
EXPLAIN QUERY PLAN SELECT * FROM users WHERE email = 'a@example.com';
Explanation

Very useful in mobile, local, and embedded app debugging.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Related commands

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PostgreSQL EXPLAIN ANALYZE
See actual runtime, loops, and buffer reads.
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MySQL EXPLAIN
Inspect access path and chosen key.
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MongoDB executionStats
Check keys examined and docs examined.
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Healthy plan signals
A quick review checklist after creating an index.