Muscle atrophy, or muscle wasting, results from loss of muscle tissue. Little or no physical exercise and a sedentary lifestyle are common causes of muscle atrophy, in this case called disuse atrophy.
PRIMARY KEY Constraints. A table typically has a column or combination of columns that contain values that uniquely identify each row in the table. This column, or columns, is called the primary key (PK) of the table and enforces the entity integrity of the table.
To modify a primary key. Open the Table Designer for the table whose primary key you want to modify, right-click in the Table Designer, and choose Indexes/Keys from the shortcut menu. In the Indexes/Keys dialog box, select the primary key index from the Selected Primary/Unique Key or Index list.Complete an action from the following table: To. Follow these steps. Rename the primary key. Type a new name in the Name box.Make sure that your new name does not duplicate a name in the Selected Primary/Unique Key or Index list. Set the clustered option. To create a clustered index for the primary key, select Create as CLUSTERED, and select the option from the drop-down list box.ype a new name in the Name box. Make sure that your new name does not duplicate a name in the Selected Primary/Unique Key or Index list. Set the clustered option. To create a clustered index for the primary key, select Create as CLUSTERED, and select the option from the drop-down list box.