# Forms and Data

URL: /chirp/docs/build-apps/forms-data/
Section: forms-data
Tags: data, database, forms, validation, mutations

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Use this section when request data becomes application data: parse forms, validate mutations, query storage, paginate results, and keep optional data extras explicit. Database Database SQLite and PostgreSQL access Typed async queries, row mapping, transactions, streaming, and LISTEN/NOTIFY. Magnifying Glass Query Builder Immutable chainable queries Dynamic filters with where_if(), transparent SQL, typed results. Upload Migrations Forward-only SQL migrations Numbered SQL files, automatic tracking, runs at startup. Forms & Validation Form parsing and validation rules Multipart forms, validation results, and error rendering.

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