Development & Testing

Drizzle ORM

Lightweight, type-safe SQL ORM for TypeScript with zero dependencies, SQL-like syntax, and blazing-fast migrations.

Claude Code Codex Copilot Cursor Gemini CLI Windsurf

Overview

Drizzle ORM is a TypeScript-first ORM that gives you SQL-like syntax with full type safety and zero overhead. Unlike traditional ORMs that abstract away SQL, Drizzle embraces it: you write queries that look like SQL but are fully typed and composable. This makes it easy for AI agents to generate correct queries because the syntax maps directly to SQL concepts.

Drizzle's schema definition is pure TypeScript, meaning your table definitions are just regular code that AI agents can read, modify, and extend. The migration system (drizzle-kit) automatically generates SQL migration files by diffing your schema against the database, so your agent can evolve the schema and handle migrations seamlessly. It supports PostgreSQL, MySQL, SQLite, and Turso.

What makes Drizzle ideal for AI-assisted development is its thin abstraction layer. The generated SQL is predictable and performant, queries are composable without a query builder DSL, and the relational query API handles complex joins elegantly. Your agent can write efficient database code without the hidden N+1 query pitfalls common in heavier ORMs.

Who Is This For?

TypeScript developers who want SQL-like syntax with full type safety
Teams building serverless applications where bundle size matters
Developers migrating from raw SQL who want type safety without heavy abstractions
Projects using edge runtimes (Cloudflare Workers, Vercel Edge) that need a lightweight ORM

Installation

Setup for Claude Code

npm install drizzle-orm postgres
npm install -D drizzle-kit
Claude Code manages schema and migrations via bash

Configuration

// drizzle.config.ts
import { defineConfig } from "drizzle-kit";
export default defineConfig({
  schema: "./src/db/schema.ts",
  out: "./drizzle",
  dialect: "postgresql",
  dbCredentials: { url: process.env.DATABASE_URL! },
});