Varan → Guides

How to actually use it.

Task-shaped walkthroughs, what the features do and why, and the measurements behind the claims. Everything here works on the free public beta — no signup needed to download, no approval to wait for.

How-to

Start here. Each one is a single task, end to end.

Start here How to migrate between databases MongoDB, MySQL, PostgreSQL. Write the target schema as SELECTs, run PLAN to see the DDL without creating anything, read the referential check, then run it in byte-sized batches you can pause and resume. Join tables from different databases MySQL + PostgreSQL + CSV in one statement, with no ETL in between. Query MongoDB with SQL And join a collection to a Postgres table while you are at it. Join a CSV to PostgreSQL A spreadsheet someone emailed you, against the real table.

Concepts

What the features actually are, and why they work the way they do.

Cross-source SQLQuerying across databases and files, explained — and how it differs from ETL. MongoDB as SQLHow schema inference turns documents into columns, counted rather than sampled. Data version controlGit-style history for your databases and files. Database rollbackUndoing committed changes, explained. Column-level lineageTrace where every column came from. Anomaly detectionCatch bad data before you query it.

Benchmarks

Numbers, and how they were measured.

Reading MongoDB without hurting the server83× less mongod CPU for the same exact census. Schema inference accuracyMeasured on real data, against sampling.

Compared

Honest differences, including where the other tool wins.

Varan vs DBeaverA cross-database SQL client compared. Varan vs DataGripCross-database SQL in one query, compared. Varan vs TablePlusA cross-database SQL client compared.

Try it

Varan runs on macOS and Windows, joins PostgreSQL, MySQL, MongoDB, SQL Server, Oracle, SQLite, DuckDB and CSV/Excel in one statement, and installs nothing on any database server. Free during the public beta.

Download Varan →

Looking for the reference manual instead? That is the docs. Something missing, or something here that is wrong? Write to info@varan.cloud.