Compare

SQL: 18 options

18 options compared · 10 tutorial, 3 reference, 2 skill, 1 rule pack, 1 mcp server, 1 agent

Comparing 18 options

SQL — Set-based thinking, window functions, CTEs and query plans. The highest-ROI skill in the field. The registry currently holds 18 resources: 10 tutorials, 3 references, 2 skills, 1 rule pack, 1 mcp server, 1 agent.

Side by side

Every field below comes from the curated record — nothing is sponsored or ranked by payment:

Resource	Type	Difficulty	Verification	Score
DuckDB / MotherDuck MCP Server	MCP server	beginner	community	44.4
SQL Review	Skill	beginner	community	39.9
SQLFluff Core Rule Pack	Rule Pack	beginner	community	39.7
SQL Query Plan Explainer	Skill	intermediate	community	38.5
SQL Reviewer	Agent	beginner	community	34.5
First hands-on — a correct SELECT with a justified join	Tutorial	beginner	community	34.15
Fix SQL lint with the SQLFluff core rule pack	Tutorial	beginner	community	34.15
Review SQL for fan-out joins	Tutorial	beginner	community	34.15
Run the full SQL review pass on a PR	Tutorial	beginner	community	34.15
The relational mental model — sets, grain, and NULL	Tutorial	beginner	community	34.15
Capstone — the SQL correctness checklist	Tutorial	intermediate	community	34.15
Incident — the numbers doubled and no alarm fired	Tutorial	intermediate	community	34.15
Production gotchas — NULL traps, implicit casts, silent drift	Tutorial	intermediate	community	34.15
Read an EXPLAIN plan and pick the one fix	Tutorial	intermediate	community	34.15
Window functions — keep the grain, rank the rows	Tutorial	intermediate	community	34.15
DuckDB Documentation	Reference	—	community	27.7
SQLBolt — Learn SQL with Simple Interactive Exercises	Reference	—	community	27.7
Jev and DuckDB: Plain-English Conditions in SQL	Reference	—	community	23.55

Trust breakdown

Verification mix: 18 community. No evidence gaps: every claim on file matches the record. Read how verification works — nothing here is independently audited yet, and the site says so everywhere it matters.

Security posture

Flagged entries: DuckDB / MotherDuck MCP Server (1), SQL Review (1), SQLFluff Core Rule Pack (1), SQL Query Plan Explainer (1), SQL Reviewer (1). Flags record declared capabilities (credentials, write access, network calls) — they are facts to review, not verdicts. Every entry also passes the 30-rule static trust scan; findings print on each detail page.

How to choose

How to choose: start with DuckDB / MotherDuck MCP Server, SQL Review for the gentlest on-ramp; Weight verification and evidence over score when two entries are close, and check the last-verified date on each page — the registry re-checks every 180 days.