![ERD from SQL Server Express Database.](https://www.datensen.com/blog/wp-content/uploads/sql-express-erd.jpg)
Category: ER diagram
How to create ER diagrams for relational databases like PostgreSQL, MySQL or MariaDB and ER diagrams for nosql databases like MongoDB.
![ERD from SQL Server Express Database.](https://www.datensen.com/blog/wp-content/uploads/sql-express-erd.jpg)
![ER diagram from Azure SQL Server database](https://www.datensen.com/blog/wp-content/uploads/loaded-structure-1.png)
Step-by-Step Guide: Creating an ER Diagram from Azure SQL Server Database Structure
![Database diagram](https://www.datensen.com/blog/wp-content/uploads/database-diagram.jpg)
How to Create a Database Diagram?
![AdventureWorks ER Diagram](https://www.datensen.com/blog/wp-content/uploads/adventureworks-erd.webp)
AdventureWorks Sample Database
![Diagram used instead of the show collections command in MongoDB](https://www.datensen.com/blog/wp-content/uploads/mongodb-show-collections-moon-modeler.webp)
How to list databases and show collections in MongoDB
![PostgreSQL Show Tables and Diagram](https://www.datensen.com/blog/wp-content/uploads/postgresql-show-tables.jpg)
How to Show Tables in Postgres
![ER Diagram for PostgreSQL database created with Luna Modeler](https://www.datensen.com/blog/wp-content/uploads/er-diagram-postgresql.webp)
ER Diagram Samples
![Relationships in ERD](https://www.datensen.com/blog/wp-content/uploads/relationships-in-erd.png)
Relationships in ER diagrams
![ER Diagram tool for macOS - Luna Modeler](https://www.datensen.com/blog/wp-content/uploads/database-design-tool-macos-luna-modeler.webp)
ER Diagram tool for macOS
![Heroku PostgreSQL ERD made with Luna Modeler](https://www.datensen.com/blog/wp-content/uploads/pg-heroku-1-1.png)
Heroku Postgres and ER diagrams
![Crow's feet notation in ERD](https://www.datensen.com/blog/wp-content/uploads/crows-feet-notation-erd.png)
Crow’s foot notation in ER diagram
![SQL Server ERD Creator](https://www.datensen.com/blog/wp-content/uploads/sql-server-erd-creator.png)
SQL Database creator
![NoSQL Data Modeling - Diagram made with Moon Modeler](https://www.datensen.com/blog/wp-content/uploads/nosql-data-modeling-1.png)
NoSQL Data Modeling
![entity relationship diagram](https://www.datensen.com/blog/wp-content/uploads/entity-relationship-diagram.png)
What is Entity Relationship Diagram (ERD)?
![One to one relationship](https://www.datensen.com/blog/wp-content/uploads/2021/10/one-to-one-relationship-b-1.png)
One-to-one relationships
![Many to many relationship](https://www.datensen.com/blog/wp-content/uploads/2021/10/many-to-many-relationship-1.png)
Many-to-many relationships
![One to many relationship](https://www.datensen.com/blog/wp-content/uploads/2021/10/one-to-many-relationship.png)
One-to-many relationships
![PostgreSQL vs MongoDB](https://www.datensen.com/blog/wp-content/uploads/postgresql-vs-mongodb.png)