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The ERD (Entity-Relationship Diagram) is a visual map of your project’s database. It’s generated directly from your schema, so it’s always current — no separate diagramming tool to keep in sync. To open it, go to a table on the Data page (Rows or Schema tab) and click ERD under DB-Level Tools, next to SQL Playground. The full ERD, showing every table in the project and the relationships between them

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What you’re looking at

Each box is a table, with its column names and data types. Lines connect related tables, and a small badge on each line — 1:1, 1:N — shows the cardinality of that relationship. The header bar reports the diagram’s scope at a glance, for example “18 of 18 tables · 25 relationships · fields + types.” Zoom into a table and each field shows a type icon: a key icon for uuid identifiers, A-Z for text fields, a checklist icon for enum, and a clock icon for date/time fields. A single table zoomed in, showing field type icons and 1:1 / 1:N relationship badges on its connections

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Detail level

Two toggles in the toolbar control how much the diagram shows:
  • Tables / Tables + fields — collapse boxes to just their table name, or expand them to list every column.
  • Types — show or hide the data type next to each field.
For projects with many tables, the diagram gives you a few ways to manage the view:
  • Zoom and pan — scroll to zoom, drag to pan. The + / − controls and a fit-to-screen button sit in the bottom-left corner, along with a minimap for jumping around a large diagram.
  • Full Screen — expand the diagram to the whole browser window.
  • All tables filter — a dropdown listing every table in the diagram with a checkbox next to each. Uncheck a table to drop it from the view and focus on a subset of your schema; a Rebalance diagram button re-lays-out the remaining tables, and Clear all hides everything so you can build the view up table by table.
The table filter dropdown, with a checkbox per table and a Rebalance diagram action

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Exporting

The Export dropdown turns the diagram into something you can paste into a doc or share with your team:
  • Current view / All sources — export just what’s on screen, or every table regardless of the current filter.
  • Copy image (⌘C / Ctrl+C) — copies the diagram straight to your clipboard.
  • PNG — downloads a 2x, retina-resolution raster image.
Both export options carry the diagram exactly as shown, including whichever tables are selected and whether fields and types are visible. The Export dropdown, with Current view / All sources scope, Copy image, and PNG options

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Per-environment

The ERD reflects the schema of whichever environment is currently selected. Switch environments to compare a branch’s schema changes against master before merging.

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FAQ

No. The ERD is read-only — it’s a visualization of the schema, not an editor. Make schema changes on the Data page’s Schema tab.
Yes. It’s generated live from the current schema, so adding a table or field, or changing a relationship, is reflected the next time you open or refresh the ERD.
They show the cardinality of the relationship between the two connected tables — one-to-one or one-to-many — based on how the relationship field is configured.
Yes. Use the All tables filter to uncheck the tables you don’t want, then export with the scope set to Current view — only the tables still checked are included.