Viewing the selectivity of indexes

You can check the selectivity of an index on an indexed table or a table that is yet to be indexed.

To view the selectivity of column indexes:

1. From the Netcool/OMNIbus Administrator window, select the System menu button.
2. Click Databases. The Databases, Tables and Columns pane opens.
3. Select the table containing the required column and then click the Data View tab.
4. Right-click the column and click Indexes > Column Selectivity. A window is displayed showing the selectivity rating.
   Note: All currently indexed columns are denoted by an icon on the Data View tab or can be viewed in the catalog.indexes table.