Database diagram tool examples.
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What a database diagram is.
A database diagram is a visual map of the tables in a database and the keys that connect them. It makes the structure behind an application readable without opening every table definition or migration.
Use the diagram to check how a record travels through a process. A product can connect to inventory, purchase-order lines, and orders; the foreign keys make each of those paths explicit.
- 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 a database diagram tool.
Stores, suppliers, products, inventory, and purchase orders connected for stock planning.
Suppliers, warehouses, purchase orders, products, and stock levels organized in one model.
Automotive parts, suppliers, categories, warehouses, and on-hand inventory mapped for replenishment.
How to make a database diagram 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
What is a database diagram?
A database diagram shows the tables in a database, their fields, and the relationships created by keys. It is often drawn as an entity relationship diagram, or ERD.
Why make a database diagram before building?
It helps identify the records the system needs, how they connect, and whether a relationship needs a linking table. That gives developers a model to review before creating tables and queries.
What is the difference between a database diagram and a schema?
A schema is the formal database definition: tables, columns, constraints, and types. A database diagram is the visual representation that makes that structure and its relationships easier to understand.
How do I describe a database for a diagram?
List the main records, their identifiers, the important attributes, and their relationships. For example, say that each purchase order is placed with one supplier and has many purchase-order lines.
Can I use a database diagram for existing systems?
Yes. Document the tables and known relationships to create an overview for maintenance, onboarding, troubleshooting, or planning a schema change.
Other drawings for the same work.
Draw a database diagram.
Free account, no card. Describe the tables and how they connect.
Open the editor