What is a Er Diagram?
An Entity Relationship (ER) diagram is a visual blueprint for your database. It shows the entities (like 'User' or 'Product'), their attributes, and how they relate to one another. Describe your data structure, and we'll create the ERD for you.
How to Create an ER Diagram in 3 Simple Steps
- 1. **Define Entities & Relationships:** Describe your database schema. For example, 'A CUSTOMER has a one-to-many relationship with ORDER. An ORDER has a many-to-many relationship with PRODUCT.'
- 2. **Generate with AI:** Our AI will interpret your text and generate the Mermaid.js code for your ER diagram.
- 3. **Export & Use:** Your database schema is visualized on the right. Copy the code, share a link, or refine the diagram by adding more entities.
Frequently Asked Questions
What do the relationship notations mean?
They define cardinality—how many instances of one entity can relate to another (e.g., one-to-one, one-to-many, many-to-many). You can specify them in your prompt.
Can I add attributes and keys to my entities?
Absolutely. For example, say 'The User entity has a primary key 'id', a string 'name', and an integer 'age'.