SQL to ER diagram examples.
Same tool, four requests. Every drawing below is a real render.
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What a SQL to ER diagram is.
A SQL to ER diagram turns table definitions into a picture of the data model. Tables become entities, columns become attributes, and primary and foreign keys make the relationships visible.
The drawing is useful for reading a schema at a glance. It does not run SQL or connect to a database; it represents the structure you describe or paste.
- Standard
- Chen 1976 / Everest 1976 (crow's foot)
- Also follows
- Implements the crow's-foot subset
- Engine
- schematex-erd
- Editable
- Double-click text, drag nodes
- Export
- SVG · PNG · PDF
Who uses SQL to ER diagrams.
A compact view of inventory tables and their keys before implementing queries and screens.
A schema sketch for users, roles and types when planning the data behind an API.
Library tables and foreign keys documented for an existing system.
How to make an ER diagram from SQL in three steps.
Describe it
One paragraph is enough to start.
See the drawing
Drawn by the right engine.
Say what changes
Every edit keeps a version.
Common questions
Can I create an ER diagram from SQL?
Describe or paste the table definitions, columns and key relationships, and the tool can draw the database structure as an ER diagram.
Does the tool execute my SQL?
No. The SQL or schema description is used as input for a drawing; it does not execute queries or connect to your database.
How are primary and foreign keys shown?
Primary keys identify a table's rows. Foreign keys are shown on the referencing table and connect it to the referenced table.
Which SQL dialect should I use?
Use familiar table and column definitions from the schema you are documenting. Make relationships and key columns explicit so the intended structure is clear.
Other drawings for the same work.
Turn a schema into an ER diagram.
Free account, no card. Paste the tables or describe the relationships.
Open the editor