How to add ER Data Type

You can create ER diagrams in Astah Professional edition.
Astah ER Diagram
Astah ER Data TypeER Data Type

Astah has a set of ER Data Types that are often used, and you can choose one as a default type. In Astah, CHAR is set as default, so when you add an attribute to ER Entity, its data type would be CHAR.
How to add ER Data Type

The set of ER Data Types does not cover all the types in the RDBMS, so when you need one not listed,, you can add one by yourself. To do so,

(1) Go to [Tool] – [ER Diagram] – [Set ER Data Type] or select it from [ER Model] packages menu.

(2) [Set ER Data Type] dialog box appears. Click [Add] button and then add a new ER Data Type in a small dialog box.







Then added Data Type will appear in the scroll-down list of Attribute’s property view.








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