ERD Builder

Interactive schema dashboard

Entity

Entity name Primary key Columns, one per line

Columns are optional. The primary key is auto-tagged in the diagram and exports.

From table To table

Foreign key column Referenced column

From cardinality To cardinality

Typical one-to-many: from = 1, to = many. Example: users → orders via user_id.

Entities

Relationships

Primary keys

Foreign keys

Table-by-table links with cardinality labels

Connection path with arrow endpoint PK Primary key