Online Documentation for SQL Administrator for SQL Server
Filter
Use the Filter tab to set the filter predicate for the index.
Filter
Use this text field to specify which rows to include in the index to create a filtered index. The filtered index must be a nonclustered index on a table. Creates filtered statistics for the data rows in the filtered index.
The filter predicate uses simple comparison logic and cannot reference a computed column, a UDT column, a spatial data type column, or a hierarchyID data type column. Comparisons using NULL literals are not allowed with the comparison operators. Use the IS NULL and IS NOT NULL operators instead.