Serverless SQLite database on Cloudflare's edge with migrations, batch queries, and built-in error prevention.

• Create and manage D1 databases with wrangler CLI, apply SQL migrations sequentially with automatic tracking, and query from Workers using prepared statements with .bind() for SQL injection prevention
• Supports three query methods: .all() for multiple rows, .first() for single row, .batch() for sequential multi-statement execution in one network round trip
• Prevents 14 documented errors including statement length limits (batch into 100-250 rows), transient network failures (implement exponential backoff retry), foreign key conflicts (use PRAGMA defer_foreign_keys), and scaling limits (sharding for 10 GB cap, hybrid D1+R2 for 2 MB row size)
• Automatic read-only query retries (up to 2 attempts), remote bindings for local dev connecting to production D1, and jurisdiction support for data localization compliance