About SQL Trail

SQL Trail is a local-first SQL learning product focused on transparent validation, original data worlds, and durable SQL understanding.

Core learning works without an account, PostgreSQL, or account configuration. Optional accounts add backup and cross-device sync only after authentication and scope choice.

Runtime lessons, datasets, icons, fonts, and images are local app assets rather than remote dependencies.

Run and Check SQL executes in the browser worker instead of a remote SQL service.

SQL Trail has no telemetry or analytics SDK in this phase, and diagnostics exclude sensitive learner and account content by default.

Canonical SQL and negative fixtures are checked locally through automated scripts before release.

Public content has a typed provenance record, review status, source list, and SEO integrity checks.