Free online SQL compiler and database query tool. Write, test, and run SQL queries in your browser. Perfect for learning database management and SQL. SQL OnLine - SQLite, DuckDB, PGLite, MariaDB / MySQL, PostgreSQL, MS SQL Server. AI error analysis, User-friendly interface for Data Science. No registration for start, No DownLoad, No Install. | sql compiler , federated queries, temporal query federation, BI Analytics myCompiler is a web-based IDE that lets you write, run and test SQL code without installing anything. It supports autocomplete, syntax highlighting, multi-language and code organization features.