cloudflare-d1

# Cloudflare D1 Database

**Status**: Production Ready ✅
**Last Updated**: 2026-01-20
**Dependencies**: cloudflare-worker-base (for Worker setup)
**Latest Versions**: wrangler@4.59.2, @cloudflare/workers-types@4.20260109.0

**Recent Updates (2025)**:
- **Nov 2025**: Jurisdiction support (data localization compliance), remote bindings GA (wrangler@4.37.0+), automatic resource provisioning
- **Sept 2025**: Automatic read-only query retries (up to 2 attempts), remote bindings public beta
- **July 2025**: Storage limits increased (250GB → 1TB), alpha backup access removed, REST API 50-500ms faster
- **May 2025**: HTTP API permissions security fix (D1:Edit required for writes)
- **April 2025**: Read replication public beta (read-only replicas across regions)
- **Feb 2025**: PRAGMA optimize support, read-only access permission bug fix
- **Jan 2025**: Free tier limits enforcement (Feb 10 start), Worker API 40-60% faster queries

---

## Quick Start (5 Minutes)

### 1. Create D1 Database

```bash
# Create a new D1 database
npx wrangler d1 create my-database

# Output includes database_id - save this!
# ✅ Successfully created DB 'my-database'
#
# [[d1_databases]]
# binding = "DB"
# database_name = "my-database"
# database_id = "<UUID>"
```

### 2. Configure Bindings

Add to your `wrangler.jsonc`:

```jsonc
{
  "name": "my-worker",
  "main": "src/index.ts",
  "compatibility_date": "2025-10-11",
  "d1_databases": [
    {
      "binding": "DB",                    // Available as env.DB in your Worker
      "database_name": "my-database",      // Name from wrangler d1 create
      "database_id": "<UUID>",             // ID from wrangler d1 create
      "preview_database_id": "local-db"    // For local development
    }
  ]
}
```

**CRITICAL:**
- `binding` is how you access the database in code (`env.DB`)
- `database_id` is the production database UUID
- `preview_database_id` is for local dev (can be any string)
- **Never commit real `database_id` values to public repos** - use e