SQL Database Support for pREST
prest/prest
Guides classifying, gap-analyzing and scaffolding support for a new SQL database in pREST, from Postgres-compatible variants to entirely new dialects.
数据库学习与选型技能。面向零基础学习者，系统学习数据结构、事务、索引、查询优化等核心概念，对比 MySQL 与 PostgreSQL 的差异与适用场景。触发词："数据库学习"、"学数据库"、"数据库入门"、"MySQL vs PostgreSQL"、"数据库索引"、"数据库事务"、"数据库选型"、"数据库查询优化"。
Install Database Learning Skill
$ npx skills add jiushiwon/wg-skills --skill database-learning-skill -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install jiushiwon/wg-skills database-learning-skill --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/jiushiwon/wg-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/vibeCoding/backend/database/database-learning-skill .claude/skills/database-learning-skill && 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 "database-learning-skill" agent skill from https://github.com/jiushiwon/wg-skills/tree/main/vibeCoding/backend/database/database-learning-skill into .claude/skills/database-learning-skill/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-learning-skill", 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/jiushiwon/wg-skills/tree/main/vibeCoding/backend/database/database-learning-skillType 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 jiushiwon/wg-skills --skill database-learning-skill -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install jiushiwon/wg-skills database-learning-skill --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jiushiwon/wg-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/vibeCoding/backend/database/database-learning-skill .agents/skills/database-learning-skill && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "database-learning-skill" agent skill from https://github.com/jiushiwon/wg-skills/tree/main/vibeCoding/backend/database/database-learning-skill into .agents/skills/database-learning-skill/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-learning-skill", 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 jiushiwon/wg-skills --skill database-learning-skill -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install jiushiwon/wg-skills database-learning-skill --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jiushiwon/wg-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/vibeCoding/backend/database/database-learning-skill .cursor/skills/database-learning-skill && 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 "database-learning-skill" agent skill from https://github.com/jiushiwon/wg-skills/tree/main/vibeCoding/backend/database/database-learning-skill into .cursor/skills/database-learning-skill/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-learning-skill", 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/jiushiwon/wg-skills.git --path vibeCoding/backend/database/database-learning-skill--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 jiushiwon/wg-skills --skill database-learning-skill -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install jiushiwon/wg-skills database-learning-skill --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jiushiwon/wg-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/vibeCoding/backend/database/database-learning-skill .gemini/skills/database-learning-skill && 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 "database-learning-skill" agent skill from https://github.com/jiushiwon/wg-skills/tree/main/vibeCoding/backend/database/database-learning-skill into .gemini/skills/database-learning-skill/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-learning-skill", 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 jiushiwon/wg-skills database-learning-skillInstalls 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 jiushiwon/wg-skills --skill database-learning-skill -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/jiushiwon/wg-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/vibeCoding/backend/database/database-learning-skill .github/skills/database-learning-skill && 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 "database-learning-skill" agent skill from https://github.com/jiushiwon/wg-skills/tree/main/vibeCoding/backend/database/database-learning-skill into .github/skills/database-learning-skill/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-learning-skill", 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 jiushiwon/wg-skills --skill database-learning-skill -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install jiushiwon/wg-skills database-learning-skill --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jiushiwon/wg-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/vibeCoding/backend/database/database-learning-skill .opencode/skills/database-learning-skill && 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 "database-learning-skill" agent skill from https://github.com/jiushiwon/wg-skills/tree/main/vibeCoding/backend/database/database-learning-skill into .opencode/skills/database-learning-skill/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-learning-skill", 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
database-learning-skill- GitHub stars
- 110
- Token cost
- ~1k tokens
- SKILL.md length
- 279 words
- Files
- 7 (incl. references)
- Skills in repo
- 121
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
数据库学习与选型技能。面向零基础学习者，系统学习数据结构、事务、索引、查询优化等核心概念，对比 MySQL 与 PostgreSQL 的差异与适用场景。触发词："数据库学习"、"学数据库"、"数据库入门"、"MySQL vs PostgreSQL"、"数据库索引"、"数据库事务"、"数据库选型"、"数据库查询优化"。
- Works in 6 steps: 数据结构（表设计） → SQL 查询 → 索引（核心） → …
- Databases work in your project
- SKILL.md covers 核心理念, 学习路径, 学习模块 and 设计规范, plus 4 more sections
- Calls mysql
What it does
Database Learning Skill is an agent skill from jiushiwon/wg-skills. 数据库学习与选型技能。面向零基础学习者，系统学习数据结构、事务、索引、查询优化等核心概念，对比 MySQL 与 PostgreSQL 的差异与适用场景。触发词："数据库学习"、"学数据库"、"数据库入门"、"MySQL vs PostgreSQL"、"数据库索引"、"数据库事务"、"数据库选型"、"数据库查询优化"。
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including reference files (for example `README.md`, `references/index-guide.md` and `references/mysql-vs-pgsql.md`).
It sits in Databases. It works with PostgreSQL, MySQL and SQL. The licence is Apache-2.0.
When your agent uses it
- Databases work in your project
Example prompts
- “MySQL vs PostgreSQL”
- “数据库查询优化”
- “/database-learning-skill”
Workflow steps
6 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit a4a640b. 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
Shell commands in SKILL.md call:
mysql
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Database Learning Skill loads about 1k tokens when it runs, and up to ~9.6k if it reads all its reference files. Until then it costs about 46 tokens; SKILL.md has 279 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); files beside SKILL.md are not scanned.
SKILL.md
The full file from jiushiwon/wg-skills at commit a4a640b, republished under its Apache-2.0 licence (© jiushiwon). 279 words, ~1,002 tokens.
Download SKILL.mdSave it as
.claude/skills/database-learning-skill/SKILL.md (or your agent's skills folder). This skill also uses 6 other files; get the full folder from GitHub.- name
- database-learning-skill
- description
- 数据库学习与选型技能。面向零基础学习者，系统学习数据结构、事务、索引、查询优化等核心概念，对比 MySQL 与 PostgreSQL 的差异与适用场景。触发词："数据库学习"、"学数据库"、"数据库入门"、"MySQL vs PostgreSQL"、"数据库索引"、"数据库事务"、"数据库选型"、"数据库查询优化"。
Database Learning Skill
面向零基础学习者，系统学习数据库核心概念，掌握数据库选型与优化能力。
核心理念
数据库 = 数据的仓库 + 管理的艺术
学数据库不是背命令，而是理解：
- 数据如何组织（表结构）
- 数据如何关联（关系）
- 数据如何高效查找（索引）
- 数据如何安全（事务）
- 什么场景选什么数据库（选型）
学习路径
数据库入门
↓
表结构设计（数据结构）
↓
数据查询（SQL 基础）
↓
索引与查询优化
↓
事务与并发控制
↓
MySQL vs PostgreSQL 选型学习模块
1. 数据结构（表设计）
| 概念 | 说明 |
|---|---|
| 表（Table） | 数据的二维表格，像 Excel |
| 字段（Column） | 表的列，如 id、name、age |
| 记录（Row） | 表的行，一条数据 |
| 主键（Primary Key） | 唯一标识一条记录 |
| 外键（Foreign Key） | 表与表的关联 |
| 约束 | 数据的规则（唯一、非空、默认值） |
实战：设计一个用户表、一个订单表
2. SQL 查询
| 操作 | SQL 关键字 |
|---|---|
| 查询 | SELECT |
| 插入 | INSERT |
| 更新 | UPDATE |
| 删除 | DELETE |
| 条件 | WHERE |
| 排序 | ORDER BY |
| 分组 | GROUP BY |
| 聚合 | COUNT/SUM/AVG/MAX/MIN |
3. 索引（核心）
为什么需要索引？
无索引：逐行扫描 → 10万行 = 10万次 IO
有索引：B+Tree 定位 → 10万行 ≈ 3次 IO| 索引类型 | 说明 | 适用场景 |
|---|---|---|
| 主键索引 | 自动唯一，非空 | 主键字段 |
| 唯一索引 | 字段值唯一 | username、email |
| 普通索引 | 加速查找 | 常用查询字段 |
| 复合索引 | 多字段组合 | 多条件查询 |
| 全文索引 | 文本搜索 | 文章内容搜索 |
最左前缀原则：复合索引 (a, b, c) 能命中 a、a+b、a+b+c，不能命中 b、c
4. 事务（核心）
什么是事务？
事务 = 一组 SQL 操作，要么全部成功，要么全部失败
转账场景：
1. A 账户 -1000
2. B 账户 +1000
必须一起成功或一起失败ACID 特性
| 特性 | 说明 |
|---|---|
| Atomic（原子性） | 不可分割，要么全成功要么全失败 |
| Consistency（一致性） | 事务前后数据状态一致 |
| Isolation（隔离性） | 并发事务互不干扰 |
| Durability（持久性） | 提交后数据永久保存 |
隔离级别
| 级别 | 脏读 | 不可重复读 | 幻读 |
|---|---|---|---|
| 读未提交 | 有 | 有 | 有 |
| 读已提交 | 无 | 有 | 有 |
| 可重复读 | 无 | 无 | 有 |
| 串行化 | 无 | 无 | 无 |
MySQL 默认：可重复读（RR） PostgreSQL 默认：读已提交（RC）
5. 查询优化
为什么要优化？
慢查询是数据库性能的最大杀手。一个没有索引的查询可能让整个系统变慢。
如何发现慢查询？
-- MySQL：开启慢查询日志
SHOW VARIABLES LIKE 'slow_query_log';
SELECT * FROM slow_log ORDER BY start_time DESC LIMIT 10;
-- PostgreSQL：查看慢查询统计
SELECT * FROM pg_stat_statements ORDER BY total_time DESC LIMIT 10;
-- 使用 EXPLAIN 分析查询
EXPLAIN SELECT * FROM users WHERE username = 'test';核心优化思路
- 加索引 → WHERE 条件字段必须有索引
- **避免 SELECT *** → 只查询需要的字段
- 避免函数运算 → WHERE YEAR(created_at)=2024 改为 WHERE created_at >= '2024-01-01'
- 分页优化 → 大偏移量用游标分页（WHERE id > last_id）
详细的性能优化规范见
database-design-skill。
6. MySQL vs PostgreSQL 选型
| 特性 | MySQL | PostgreSQL |
|---|---|---|
| 定位 | Web 应用 | 企业级/复杂查询 |
| 事务 | 支持 | 支持（更完善） |
| JSON | 支持 | 更强（JSONB） |
| 全文搜索 | 基础 | 强大 |
| 地理信息 | 插件 | 原生支持 |
| 窗口函数 | 支持 | 完整支持 |
| CTEs | 8.0+ 支持 | 原生支持 |
| 主从复制 | MySQL Binlog | PostgreSQL WAL |
| 性能 | 简单查询快 | 复杂查询强 |
| 生态 | 广泛 | 增长快 |
选型建议
| 场景 | 推荐 |
|---|---|
| 博客、CMS、电商 | MySQL |
| 数据分析、报表 | PostgreSQL |
| 需要 JSON 文档 | PostgreSQL |
| 需要 GIS 地理 | PostgreSQL |
| 团队熟悉 MySQL | MySQL |
| 需要事务强一致性 | PostgreSQL |
| 高并发简单查询 | MySQL |
| 复杂查询/联表 | PostgreSQL |
设计规范
详细的设计规范（命名、字段类型、索引设计、分库分表等）见
database-design-skill。
速查要点：
- 命名：英文小写 + 下划线，表前缀
wg_，单数名词 - 基础字段：
id、status、created_at、updated_at、deleted_at - 索引：WHERE/ORDER BY/JOIN 字段必须加索引
触发场景
数据库学习：
/database-learning-skill 什么是数据库事务
/database-learning-skill 索引是什么
/database-learning-skill MySQL 和 PostgreSQL 区别
/database-learning-skill 怎么优化慢查询
/database-learning-skill 复合索引怎么用
/database-learning-skill 帮我设计一个用户表引用索引
| 文件 | 内容 |
|---|---|
references/sql-basics.md | SQL 基础语法速查 |
references/index-guide.md | 索引详解与实战 |
references/transaction-guide.md | 事务与并发控制 |
references/query-optimization.md | 查询优化实战 |
references/mysql-vs-pgsql.md | MySQL vs PG 选型对比 |
相关技能
database-design-skill：数据库设计规范mysql-guide-skill：MySQL 集成pgsql-guide-skill：PostgreSQL 集成springboot-init-skill：后端骨架（含数据库集成）fastapi-init-skill：后端骨架（含数据库集成）go-gin-init-skill：后端骨架（含数据库集成）
不做
- 不涉及数据库安装部署（参考 database-design-skill）
- 不涉及数据库集群/高可用架构
- 不涉及具体 ORM 的使用（各后端 skill 负责）
- 不涉及 SQL 深度优化（DBA 范畴）
© jiushiwon, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 6 other files (references) in vibeCoding/backend/database/database-learning-skill of jiushiwon/wg-skills.
- SKILL.md
- README.md
- references/index-guide.md
- references/mysql-vs-pgsql.md
- references/query-optimization.md
- references/sql-basics.md
- references/transaction-guide.md
Open the folder on GitHubat commit a4a640b
Compare with similar skills
Database Learning Skill 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 |
|---|---|---|---|---|---|---|
| Database Learning Skill this skilljiushiwon/wg-skills | 110 | — | ~1k | Automated safety check: Pass | Apache-2.0 | |
| SQL Database Support for pRESTprest/prest | 4.6k | — | ~1.6k | Automated safety check: Pass | MIT | |
| Chdb SQLvemetric/vemetric | 394 | 1 repos | ~1.2k | Automated safety check: Pass | Apache-2.0 | |
| Sql2erystemsrx/sql_to_ER | 188 | — | ~1.1k | Automated safety check: Pass | AGPL-3.0 | |
| Squixeduardofuncao/squix | 273 | — | ~784 | Automated safety check: Pass | MIT | |
| Golang Databaseunxed/f4 | 240 | 2 repos | ~2.9k | Automated safety check: Pass | MIT |
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Frontend Request Skill
jiushiwon/wg-skills
A skill your agent uses when designing or reviewing the request layer of a frontend project (web / uni-app / mini-program), including request.ts wrappers, interceptors, deduplication, mocks, error…
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Questions about Database Learning Skill
What does Database Learning Skill do?
数据库学习与选型技能。面向零基础学习者，系统学习数据结构、事务、索引、查询优化等核心概念，对比 MySQL 与 PostgreSQL 的差异与适用场景。触发词："数据库学习"、"学数据库"、"数据库入门"、"MySQL vs PostgreSQL"、"数据库索引"、"数据库事务"、"数据库选型"、"数据库查询优化"。. Database Learning Skill is an agent skill from jiushiwon/wg-skills.
When should I use Database Learning Skill?
Database Learning Skill fits situations like: databases work in your project.
How do I install Database Learning Skill in Claude Code?
Run `npx skills add jiushiwon/wg-skills --skill database-learning-skill -a claude-code`. Or copy the skill folder (vibeCoding/backend/database/database-learning-skill in jiushiwon/wg-skills) into .claude/skills/database-learning-skill in your project. Claude Code loads it when a task matches its description.
How do I install Database Learning Skill in Codex?
Run `npx skills add jiushiwon/wg-skills --skill database-learning-skill -a codex`. Or copy the skill folder (vibeCoding/backend/database/database-learning-skill in jiushiwon/wg-skills) into .agents/skills/database-learning-skill in your project. Codex loads it when a task matches its description.
Can I use Database Learning Skill 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 jiushiwon/wg-skills --skill database-learning-skill -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/database-learning-skill, .gemini/skills/database-learning-skill, .github/skills/database-learning-skill and .opencode/skills/database-learning-skill in your project.
What does Database Learning Skill need to run?
Going by SKILL.md and its folder, Database Learning Skill needs the command-line tools its instructions call (mysql).
Does Database Learning Skill access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Database Learning Skill 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. Review the folder before installing.
What licence does Database Learning Skill use?
Database Learning Skill is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Database Learning Skill use?
About 1k tokens (SKILL.md is roughly 4k 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 8.6k tokens, read only when the agent opens those files.
What are the alternatives to Database Learning Skill?
Skills that share tags, products or a category with Database Learning Skill: SQL Database Support for pREST (prest/prest, 4.6k stars), Chdb SQL (vemetric/vemetric, 394 stars), Sql2er (ystemsrx/sql_to_ER, 188 stars) and Squix (eduardofuncao/squix, 273 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Database Learning Skill?
jiushiwon (a GitHub user) maintains it in jiushiwon/wg-skills, which has 110 GitHub stars. The repository holds 121 skills in this directory. The repository was last updated on October 4, 2026.
Source: jiushiwon/wg-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.