The clustered index is the most powerful index that is available to you. Actually, the clustered index does not provide as much overhead as non-clustered indexes. The leaf-level nodes of the clustered index makeup the table. An clustered index traversal requires one less page IO then a non-clustered traversal because of this.

-Mike

>Hi.
>
>Is the clustered index overhead for table data entry something considerable ?
>
>Thanks.