Creating a new relationship

On ERBuilder Data Modeler, you can create relationships between two tables or between a table and itself by linking the parent table to the child table. To add a new relationship:

1. From the toolbox, select one of the available relationships icons:

· Identifying relationships

· Non-identifying relationships

· Many to many relationships

2. Click on the parent table symbol in the diagram canvas:

3. Hold the mouse click and drag the cursor to the child table:

This is how a simple relationship is displayed:

The result is the added arrow captioned “Reference_1” and the inclusion of the “Parent_ID” attribute in the “Child Table”.

By contrast, a many-to-many relationship is displayed as follows:

The result is the creation of “Reference_1” and “Reference_2” arrows and the inclusion of “Parent_ID” and “Child_ID” attributes in the new “Relation Table (Table2)”.

Available in: Free, Starter, Standard, Professional and Enterprise Editions

As for reflexive relationships, you can create these types of relationships by right-clicking on the table and selecting “Reflexive Relationship” from the menu.

The result is the appearance of a “Reference_1” reflexive arrow in the diagram and the “Parent_ID_1” attribute creation in the table “Parent Table”.

Available in: Free(Only one relationship per table), Starter, Standard, Professional and Enterprise Editions