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Domains
Data domains are useful for abstracting common table fields into a single location for maintenance. For example, an email address column may be used in several tables, all with the same properties. Define a domain and use that instead of setting up each table constraint individually. 
 
  
New Domains are created within Create Domain Wizard. In order to run the wizard you should either 
  
| • | select the Object | Create Database Object... main menu item;  |  
 | • | select the Domain icon in the Create Database Object dialog |  
 or 
| • | select the Domains list or any object from that list in the explorer tree; |  
 | • | select the Create New Domain... item from the popup menu |  
 or 
| • | open Database Editor and the Domains tab there; |  
 | • | press the Insert key or select the Create New Domain item from the popup menu (alternatively, you may use the corresponding link of the Navigation Bar). |  
          
To create a new Domain with the same properties as one of the existing Domains has: 
  
| • | select the Object | Duplicate Database Object... main menu item;  |  
 | • | follow the instructions of Duplicate Object Wizard. |  
   
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Domains can be edited within Domain Editor. In order to run the editor you should either 
  
| • | select the Domain for editing in the explorer tree (type the first letters of the Domain name for quick search);  |  
 | • | select the Edit Domain... item from the popup menu |  
 or 
| • | open Database Editor and the Domains tab there; |  
 | • | select the Domain to edit; |  
 | • | press the Enter key or select the Edit Domain item from the popup menu (alternatively, you may use the corresponding link of the Navigation Bar). |  
   
You can change the name of the Domain using the Rename Domain dialog. To open the dialog you should either 
  
| • | select the Domain to rename in the explorer tree;  |  
 | • | select the Rename Domain item from the popup menu |  
 or 
| • | open Database Editor and the Domains tab there; |  
 | • | select the Domain to rename; |  
 | • | select the Rename Domain item from the popup menu (alternatively, you may use the corresponding link of the Navigation Bar). |  
   
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To drop a Domain: 
  
| • | select the Domain to drop in the explorer tree;  |  
 | • | select the Drop Domain item from the popup menu |  
 or 
| • | open Database Editor and the Domains tab there; |  
 | • | select the Domain to drop; |  
 | • | press the Delete key or select the Drop Domain item from the popup menu (alternatively, you may use the corresponding link of the Navigation Bar) |  
   
and confirm dropping in the dialog window. 
  
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