Filtering data items for unique values

Data item table fields can be defined so only one occurrence of any repeating value is returned.

步骤:

1. Start ArcMap.
2. Load a map document that contains a graphic table element.
3. Verify that you are in layout view if necessary.
4. Right-click the graphic table element and choose Properties.

   The Table Properties dialog box appears.

5. If necessary, click the Data Source tab.

   The Data Source tab appears.
6. Click Data Items on the Data Source dialog box.

   The Data Items dialog box appears.
7. Click Operations.

   The Operations Order dialog box appears.

8. From the list of operations in the Available Operations area, click UNIQUE.
9. Click the Move button .

   The UNIQUE option is added in the Operations Order area.

10. Click OK.

    The Data Items dialog box appears, and the Unique Options button is enabled.

    
11. Click Unique Options.

    The Unique options dialog box appears.

    
12. See Filtering table fields to show unique values for complete information about using the Unique options dialog box.