NL2SQL
Ask questions in plain English. Get safe, runnable SQL.
Fastero reads your warehouse schema, generates SQL in the correct dialect, and shows you the query before anything runs. Connect Postgres, BigQuery, Snowflake, and seven more warehouses — then ask questions in natural language instead of writing joins by hand.
How it works
Schema context in, safe SQL out.
The AI reads your table definitions, understands column types and relationships, and generates SQL that matches your warehouse dialect. You review the query, edit if needed, and run it — or let auto-execute handle it for recurring checks.
Schema-aware SQL generation
Fastero reads your warehouse schema — tables, columns, types, relationships — before generating SQL. The result is a query that references real objects in your database, not hallucinated table names.
10 native warehouse connectors
Connect directly to Postgres, MySQL, MSSQL, Oracle, Redshift, BigQuery, Snowflake, Athena, Google Sheets, and more. Each connector understands the dialect so generated SQL uses the correct syntax for your warehouse.
Preview before you run
Every generated query is shown as editable SQL before execution. You can inspect it, modify joins, add filters, or copy it into your own tooling. Nothing runs until you approve it.
Optional auto-execute
For trusted queries and monitored workflows, enable auto-execute so the AI runs the query immediately and returns results. Useful for scheduled reports and trigger-driven data checks where manual approval would slow things down.
Trigger-aware caching
Results are cached and invalidated by data-change triggers. When the underlying table changes, the cache clears automatically. When nothing changes, repeated questions return instantly without hitting the warehouse.
89 tools beyond SQL
The AI agent has access to 89 tools including charting, Slack messaging, email alerts, notebook execution, and workflow actions. A question that starts as NL2SQL can end as a chart in Slack or a row in a spreadsheet.
When to use NL2SQL
Built for teams that need answers from data, not SQL expertise.
Operations and RevOps teams
Teams that need answers from warehouse data daily but do not write SQL themselves. Ask "which accounts renewed last week with usage below 50%?" and get a result without filing a ticket.
Analysts who want faster iteration
Analysts who know SQL but want a faster starting point. Use NL2SQL to draft the query, then refine joins and window functions in the editor before running.
Founders and executives
Leaders who want to check revenue, churn, or pipeline numbers without waiting for a dashboard refresh or asking someone to pull the data.
Teams already using multiple warehouses
Organizations with data split across Postgres, BigQuery, and Snowflake. Fastero connects to all of them in one workspace, so you ask questions across warehouses without switching tools.
Related capabilities
NL2SQL is one part of the Fastero workspace.
Questions become queries, queries become dashboards, dashboards become monitored workflows. Explore the rest of the product.
Hosted apps
Deploy Streamlit and Jupyter apps with org auth and always-on hosting.
Triggers
Cron, webhook, and data-change triggers that run SQL and send alerts.
Workflows
Conditions and thresholds that automate Slack, email, and API actions.
API and webhooks
Secure event delivery with HMAC signing and rate limiting.
Stop writing SQL for questions you ask every week.
Connect your warehouse, ask a question in plain English, and get schema-aware SQL you can inspect before it runs. Free to start — no credit card required.