Greenville, South Carolina. For other uses, see Greenville. Greenville (/ËÉ¡riËnvÉªl/; locally /ËÉ¡riËnvÉl/) is the county seat of Greenville County in the upstate region of South Carolina, in the United States. The city's mayor is Knox White, who has served in that position since December 1995.
Non-key Attributes. back: surrogate key. next: derived attributes. Non-key attributes are attributes that are not part of a key. Generally, most attributes are simply descriptive, and fall into this category. Consider attributes for first name, last name, birth date; usually these attributes are non-key attributes.Consider a name attribute.on-key Attributes. back: surrogate key. next: derived attributes. Non-key attributes are attributes that are not part of a key. Generally, most attributes are simply descriptive, and fall into this category. Consider attributes for first name, last name, birth date; usually these attributes are non-key attributes.
If the table contains one or more XML indexes, the clustering key of the user table is limited to 31 columns because the XML column is added to the clustering key of the primary XML index. In SQL Server, you can include nonkey columns in a nonclustered index to avoid the limitation of a maximum of 32 key columns.