Dataset Onboarding

Bring a CSV into QueryLens

This first slice imports a CSV, profiles it deterministically, drafts a semantic contract, and stores the normalized rows in Postgres before you start querying.

Back to workspace

Step 1

Upload

Step 2

Inspect

Step 3

Semantic Draft

Step 4

Complete

Current step

Upload

CSV file

Limits: 25 MB, 100k rows, 200 columns, UTF-8 CSV with a header row.

What this slice does

Imports a CSV and stores normalized rows in Postgres.

Profiles types, identifiers, measures, dimensions, and the primary time field heuristically.

Generates a semantic draft that QueryLens uses as the safe contract for first queries.

Limits supported questions to discovery, aggregates, grouped summaries, and time trends.