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database-migrations

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跨 PostgreSQL、MySQL 及常用 ORM（Prisma、Drizzle、Django、TypeORM、golang-migrate）的模式变更（schema changes）、数据迁移、回滚及零停机部署（zero-downtime deployments）的数据库迁移最佳实践。

skills/database-migrations/SKILL.md

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# 数据库迁移模式（Database Migration Patterns）

面向生产系统的安全、可逆的数据库模式变更（Schema Changes）。

## 激活时机

- 创建或修改数据库表
- 添加/删除列或索引
- 执行数据迁移（数据回填 backfill、转换 transform）
- 规划零停机（zero-downtime）模式变更
- 为新项目设置迁移工具链

## 核心原则
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