EssentialSQL: Subquery Magic - Master SQL Sub Queries.: is it worth it?
by Kris Wenzel, Essential Sql · All Levels · Development
Subquery MySql, PostgreSQL, SQLite, Microsoft SQL Server | TSQL | Correlated subquery | Inner query | Nested query
Check the alternatives in the same topic before buying. Not updated for 28 months — check whether the tools it teaches have changed.
Score breakdown
| Adjusted rating (4.49; raw 4.6 from 439 reviews) | 35 / 50 |
| Review volume (social proof) | 13 / 25 |
| Freshness (last updated Jun 2024) | 3 / 25 |
| Total | 51 / 100 |
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How it compares in SQL
Ranks #9 of 9 popular SQL courses we track by score. Its rating of 4.6 is above the SQL median of 4.5.
When to buy
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Tracked history
| Date | Rating | Reviews | Video |
|---|---|---|---|
| 2026-10-10 | 4.6 | 439 | 2h 10m |
Tracking since 2026-10-10. Snapshots are taken every few days.