Lists all of the available columns defined for the table. Use this list to select the column or columns that you want to define as a key, and then click the > push button. You can select one or more columns at the same time.

A key cannot contain more than 16 columns, and the sum of the length attributes of all of the columns for unique or primary key must not exceed 255 bytes.

Attention: Columns of data type LOB, LONG VARCHAR, or LONG VARGRAPHIC cannot be part of a primary or unique key.

Moves the selected columns in the Available columns list to the Selected columns list.

Moves all columns displayed in the Available columns list to the Selected columns list.

Moves the selected columns in the Selected columns list to the Available columns list.

Moves all columns displayed in the Selected columns list to the Available columns list.

Lists the columns defined as a key.

Use this list to view the keys or to select a column or columns to remove from the list with the < push button.

To add a column to this list, select a column from the Available columns list and then click the > push button.

Type a name for the constraint that you are defining. The name can contain up to 18 characters and be an ordinary or delimited identifier. If you do not identify a constraint, one is created for you.