database-migrationlisted
Install: claude install-skill CodeWithBehnam/cc-docs
# Database Migration
Master database schema and data migrations across ORMs (Sequelize, TypeORM, Prisma), including rollback strategies and zero-downtime deployments.
## When to Use This Skill
- Migrating between different ORMs
- Performing schema transformations
- Moving data between databases
- Implementing rollback procedures
- Zero-downtime deployments
- Database version upgrades
- Data model refactoring
## ORM Migrations
### Sequelize Migrations
```javascript
// migrations/20231201-create-users.js
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.createTable("users", {
id: {
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true,
},
email: {
type: Sequelize.STRING,
unique: true,
allowNull: false,
},
createdAt: Sequelize.DATE,
updatedAt: Sequelize.DATE,
});
},
down: async (queryInterface, Sequelize) => {
await queryInterface.dropTable("users");
},
};
// Run: npx sequelize-cli db:migrate
// Rollback: npx sequelize-cli db:migrate:undo
```
### TypeORM Migrations
```typescript
// migrations/1701234567-CreateUsers.ts
import { MigrationInterface, QueryRunner, Table } from "typeorm";
export class CreateUsers1701234567 implements MigrationInterface {
public async up(queryRunner: QueryRunner): Promise<void> {
await queryRunner.createTable(
new Table({
name: "users",
columns: [
{