Set Multivalued Attribute: An attribute that can have many values-that is, there are many distinct values entered for it in the same column of the table. Set Primary Key: An attribute that uniquely identifies a particular entity. Right-click the attribute and choose from the options at the top of the menu: When the connecting line is over the entity, a green highlight line encloses the entity, indicating that the attribute will be glued to the entity when you release the mouse button. To add an attribute to an entity, drag the Attribute from the Shapes pane toward the entity. To indicate that the relationship is optional, right-click it and select Set Identifying. Optionally, you may right-clicking the connector and select Show Multiplicity.ĭrag a Relationship and place it on top of the connector line. Drag the other end of the connector to the other entity to glue it there. The connector is now connected to that entity. Hover the shape over one of the entities, and release the mouse button. In Visio, on the File menu, select New > Software, and then select Chen's Database Notation.Ĭhoose either Metric Units or US Units, and select Create.įrom the Chen's Database Notation stencil, drag an Entity shape onto the drawing page.ĭrag another Entity shape onto the drawing page to create a second entity.ĭrag a Relationship Connector shape onto the drawing page.
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