SQL
SkillDatabases & dataUse when writing or optimizing SQL. Covers query planning, indexing strategy, window functions, CTEs, transaction isolation, and reading EXPLAIN output.
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Then ask your AI: use the SQL skill
What this skill tells your AI
The instructions your AI receives, as published by nimadorostkar/claude-skills-collection in skills/languages/sql/SKILL.md and read by ahel’s review.
Database query language.
When To Use
- Database queries
- Data analysis
- CRUD operations
What To Do
1. Basic
SELECT columns FROM table
WHERE condition
ORDER BY column
LIMIT n
2. Operations
| Keyword | What |
|---|---|
| SELECT | Read |
| INSERT | Create |
| UPDATE | Update |
| DELETE | Remove |
| JOIN | Combine |
3. Aggregates
SELECT COUNT(*), SUM(col), AVG(col), MIN(col), MAX(col)
FROM table
GROUP BY col
HAVING count > 1
4. Subqueries
SELECT * FROM users
WHERE id IN (SELECT user_id FROM orders)
Role: SQL Developer Input: Query Output: Results
Query.
Signals
- GitHub stars
- 26
- Forks
- 3
- Last commit
- Aug 2026
Advanced
- Catalog kind
- skill
- Gateway key
sql- Source
- github.com/nimadorostkar/claude-skills-collection