How to create or delete a PRIMARY KEY constraint on an existing table (Enterprise Manager)

To create or delete a PRIMARY KEY constraint on an existing table

1. Expand a server group; then expand a server.
2. Expand Databases, expand the database in which the table belongs, and then click Tables.
3. In the details pane, right-click the table, and then click Design Table.
4. While holding down the CTRL key, click each column name that comprises the primary key.
5. Right-click one of the selected column names, then click Set Primary Key.

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