Unique Keys Editor (Sybase ASE)

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The Unique Keys Editor lets you manage the columns and basic properties for a unique key as well as view page and row statistics.

To edit a unique key

1. Open an editor on the unique key. For details, see Opening an Object Editor.
2. Use the following table as a guide to understanding and modifying the settings on the tabs of this editor:

Tab	Settings and tasks
Columns	Lets you manage columns that make up the unique key. On opening, this tab shows the existing columns. For each column, the datatype (and if applicable the precision in brackets) and whether the table definition permits nulls in the target table column. Optionally you can:
		Change the Sort order of a column.
		Click the New button and select a column name from the dropdown, to add a column to the index.
		Select a column and click the Drop button to delete the column from the index.
		Select a column and use the arrow buttons to reorder the columns in the index.
Properties	Lets you work with properties in the following categories:
	Attributes	Lets you set Clustered and Maximum Rows Per Page properties.
	Storage	Lets you set the Reserve Page Gap, and Segment (DEFAULT, LOGSEGMENT, SYSTEM) properties.
Statistics	Lets you view statistics in the following categories:
	Page Statistics	Data Pages, Reserved Pages, Used Pages, OAM Page Ratio, and Index Page Ratio.
	Row Statistics	Maximum Row Size, Minimum Row Size, Max Size of Non-Leaf Index Row, and Maximum Rows Per Page.
DDL View	For details on using this tab, see Viewing the SQL/DDL for an Object.

3. When finished, you can submit your changes. For details, see Previewing and Submitting Object Editor Changes.