SQL Pro
Jeffallan/claude-skills
Optimizes SQL queries and designs schemas using CTEs, window functions, covering indexes and EXPLAIN ANALYZE, with notes on dialect differences between major databases.
Expert SQL query writing, optimization, and database schema design with support for PostgreSQL, MySQL, SQLite, and SQL Server.
Install SQL Expert
$ npx skills add aiskillstore/marketplace --skill sql-expert -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace sql-expert --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/autumnsgrove/sql-expert .claude/skills/sql-expert && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "sql-expert" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/autumnsgrove/sql-expert into .claude/skills/sql-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sql-expert", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/aiskillstore/marketplace/tree/main/skills/autumnsgrove/sql-expertType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add aiskillstore/marketplace --skill sql-expert -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace sql-expert --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/autumnsgrove/sql-expert .agents/skills/sql-expert && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "sql-expert" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/autumnsgrove/sql-expert into .agents/skills/sql-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sql-expert", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill sql-expert -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace sql-expert --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/autumnsgrove/sql-expert .cursor/skills/sql-expert && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "sql-expert" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/autumnsgrove/sql-expert into .cursor/skills/sql-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sql-expert", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/aiskillstore/marketplace.git --path skills/autumnsgrove/sql-expert--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add aiskillstore/marketplace --skill sql-expert -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace sql-expert --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/autumnsgrove/sql-expert .gemini/skills/sql-expert && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "sql-expert" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/autumnsgrove/sql-expert into .gemini/skills/sql-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sql-expert", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install aiskillstore/marketplace sql-expertInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add aiskillstore/marketplace --skill sql-expert -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/autumnsgrove/sql-expert .github/skills/sql-expert && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "sql-expert" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/autumnsgrove/sql-expert into .github/skills/sql-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sql-expert", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill sql-expert -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace sql-expert --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/autumnsgrove/sql-expert .opencode/skills/sql-expert && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "sql-expert" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/autumnsgrove/sql-expert into .opencode/skills/sql-expert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sql-expert", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
sql-expert- GitHub stars
- 430
- Token cost
- ~3.4k tokens
- SKILL.md length
- 746 words
- Files
- 12 (incl. scripts, references)
- Skills in repo
- 1,085
- Repo updated
- First seen
- Licence
- None found
At a glance
Expert SQL query writing, optimization, and database schema design with support for PostgreSQL, MySQL, SQLite, and SQL Server.
- Works in 10 steps: Always use parameterized queries to… → Use transactions for related operations… → Add appropriate constraints (PRIMARY… → …
- Working with databases for:
- SKILL.md covers Core Capabilities, Supported Database Systems, Query Writing and Query Optimization, plus 7 more sections
- Runs Python scripts from its folder; calls pip
What it does
SQL Expert is an agent skill from aiskillstore/marketplace. Expert SQL query writing, optimization, and database schema design with support for PostgreSQL, MySQL, SQLite, and SQL Server. Use when working with databases for: (1) Writing complex SQL queries with joins, subqueries, and window functions, (2) Optimizing slow queries and analyzing execution plans, (3) Designing database schemas with proper normalization, (4) Creating indexes and improving query performance, (5) Writing migrations and handling schema changes, (6) Debugging SQL errors and query issues
Its SKILL.md is about 3.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 14 other files, including scripts and reference files (for example `README.md`, `references/advanced-patterns.md` and `references/best-practices.md`).
It sits in Databases, covering SQL, Database schema design and Query optimization. It works with SQL, MySQL, PostgreSQL and SQLite. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- Working with databases for:
- Writing complex SQL queries with joins
- Window functions
- Optimizing slow queries and analyzing execution plans
Example prompts
- “/sql-expert”
Requirements
- Python 3
Workflow steps
10 steps, taken from the first numbered list in SKILL.md.
- Always use parameterized queries to prevent SQL injection
- Use transactions for related operations to ensure atomicity
- Add appropriate constraints (PRIMARY KEY, FOREIGN KEY, NOT NULL, CHECK)
- Include timestamps (created_at, updated_at) on tables
- Use meaningful names for tables and columns
- Avoid SELECT * - specify only needed columns
- Index foreign keys for join performance
- Use VARCHAR instead of CHAR for variable-length strings
- Handle NULL values properly with IS NULL / IS NOT NULL
- Use appropriate data types (DECIMAL for money, not FLOAT)
What it can do on your machine
Read from SKILL.md and the folder at commit 4ac52da. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
pip
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
SQL Expert loads about 3.4k tokens when it runs, and up to ~11k if it reads all its reference files. Until then it costs about 129 tokens; SKILL.md has 746 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 746 words (~3,447 tokens).
“Expert guidance for writing, optimizing, and managing SQL databases across PostgreSQL, MySQL, SQLite, and SQL Server.”
- name
- sql-expert
Files
SKILL.md and 11 other files (scripts, references) in skills/autumnsgrove/sql-expert of aiskillstore/marketplace.
- SKILL.md
- README.md
- examples/complex_queries.sql
- examples/migrations.sql
- examples/schema_examples.sql
- references/advanced-patterns.md
- references/best-practices.md
- references/common-pitfalls.md
- references/indexes-performance.md
- references/query-optimization.md
- scripts/sql_helper.py
- skill-report.json
Open the folder on GitHubat commit 4ac52da
Compare with similar skills
SQL Expert next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| SQL Expert this skillaiskillstore/marketplace | 430 | — | ~3.4k | Automated safety check: Pass | None | |
| SQL ProJeffallan/claude-skills | 12k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Agent SQL Proxiaoyuge886/aigc | 198 | — | ~315 | Automated safety check: Pass | MIT | |
| SQL ToolkitLeoYeAI/openclaw-master-skills | 2.2k | — | ~3k | Automated safety check: Pass | MIT | |
| Golang Databaseunxed/f4 | 240 | 2 repos | ~2.9k | Automated safety check: Pass | MIT | |
| SQL Optimizationgithub/awesome-copilot | 40k | 2 repos | ~2.3k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about SQL Expert
What does SQL Expert do?
Expert SQL query writing, optimization, and database schema design with support for PostgreSQL, MySQL, SQLite, and SQL Server. SQL Expert is an agent skill from aiskillstore/marketplace. Expert SQL query writing, optimization, and database schema design with support for PostgreSQL, MySQL, SQLite, and SQL Server.
When should I use SQL Expert?
SQL Expert fits situations like: working with databases for:; writing complex SQL queries with joins; window functions; optimizing slow queries and analyzing execution plans.
How do I install SQL Expert in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill sql-expert -a claude-code`. Or copy the skill folder (skills/autumnsgrove/sql-expert in aiskillstore/marketplace) into .claude/skills/sql-expert in your project. Claude Code loads it when a task matches its description.
How do I install SQL Expert in Codex?
Run `npx skills add aiskillstore/marketplace --skill sql-expert -a codex`. Or copy the skill folder (skills/autumnsgrove/sql-expert in aiskillstore/marketplace) into .agents/skills/sql-expert in your project. Codex loads it when a task matches its description.
Can I use SQL Expert in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add aiskillstore/marketplace --skill sql-expert -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sql-expert, .gemini/skills/sql-expert, .github/skills/sql-expert and .opencode/skills/sql-expert in your project.
What does SQL Expert need to run?
Going by SKILL.md and its folder, SQL Expert needs Python for the scripts in its folder and the command-line tools its instructions call (pip). Our summary lists: Python 3.
Does SQL Expert access the network?
SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is SQL Expert safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does SQL Expert use?
No licence was found for SQL Expert or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does SQL Expert use?
About 3.4k tokens (SKILL.md is roughly 14k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 7.8k tokens, read only when the agent opens those files.
What are the alternatives to SQL Expert?
Skills that share tags, products or a category with SQL Expert: SQL Pro (Jeffallan/claude-skills, 12k stars), Agent SQL Pro (xiaoyuge886/aigc, 198 stars), SQL Toolkit (LeoYeAI/openclaw-master-skills, 2.2k stars) and Golang Database (unxed/f4, 240 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains SQL Expert?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,085 skills in this directory. The repository was last updated on October 7, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.