To create an ERD diagram in Oracle SQL Developer, you can start by connecting to a database and selecting the desired schema. Then, you can drag and drop tables and views from the schema browser onto the diagram canvas. The tool automatically detects the relationships between entities based on foreign key constraints defined in the database.

Entity-Relationship Diagrams (ERDs) are an important tool in Oracle SQL Developer that can greatly enhance the database design and development process. ERD diagrams provide a visual representation of the database structure, allowing developers to easily understand and analyze the relationships between different entities and attributes.

A Browser panel appears in SQL Developer, which has a range of entry types. There is a lot of functionality here, but we'll just cover the basics of creating an ERD. To do this, we need to create a new Relational Model. Right-click on the Relational Models type and select New Relational Model. A new tab is shown with an empty screen.

Here’s a step-by-step guide on how to create an ER diagram using SQL Developer: First, launch SQL Developer and connect to the database you want to work with. Click on the “Connections” tab, right-click on “Connections,” and select “New Connection.”