Cloudflare/D1
- Managed, serverless SQL database using SQLite's SQL semantics, for applications running on Cloudflare Workers and Pages.
- D1 exposes SQL access through Worker bindings, a REST API, and Wrangler commands; it supports most SQLite SQL conventions.
- A relational database is a good fit for durable structured records such as accounts, saved progress, or searchable file metadata.
- ChatGPT/Sites documents D1 as its storage choice for durable, structured site data.
- Related storage for uploaded file contents: Cloudflare/R2.