Three-Step SQL Safety Check Can Prevent Accidental Mass Data Changes

Unintended bulk updates or deletions on production databases are a common risk, often caused by missing WHERE clauses, partial query selection, or misunderstood operator precedence rather than lack of SQL knowledge. A developer has outlined a three-step procedure to catch such errors before they cause damage: read the statement aloud in plain English, execute within a transaction, and verify the affected row count before committing. To support the first step, the author built SQLMegane, a browser-based static tool that parses SQL for MySQL, PostgreSQL, and SQL Server and generates a plain-language summary along with warnings and a verification SELECT query. The tool also offers a CLI that exits with a non-zero code when dangerous conditions are detected, allowing it to act as a gate in CI pipelines or pre-run hooks. No installation, account, or server is required, and all SQL analysis runs locally in the browser.