SQL 复制 WHERE StartDate > '20000101' AND EndDate <= '20000630' WHERE ComponentID IN (533, 324, 753) WHERE StartDate IN ('20000404', '20000905') AND EndDate IS NOT NULL 筛选索引不适用于 XML 索引和全文检索。 对于 UNIQUE 索引,只有所选行必须具有唯一的索引值。 筛选索引不允许有 IGNORE...
To see which indexes the query optimizer uses for a specific query, in SQL Server Management Studio, on the Query menu, select Include Actual Execution Plan. Don't always equate index usage with good performance, and good performance with efficient index use. If using an index always helped...
These include user-defined type variables or functions and user-defined functions, but can't reference a Transact-SQL statement. partition_number must exist or the statement fails. WITH ( <single_partition_rebuild_index_option> ) SORT_IN_TEMPDB, MAXDOP, DATA_COMPRESSION, and XML_COMPRESSION are...
used in mounting database, 5-6 converting data ANSI datatypes, 12-23 program interface, 8-27 SQL/DS and DB2 datatypes, 12-23 correlation names inline views, 10-17 cost-based optimization, 21-8, 30-47 extensible optimization, 21-18 histograms, 21-9 query rewrite, 10-18 ...
Specify NULL to return cached information for all tables and views in the specified database. If you specify NULL for object_id, you must also specify NULL for index_id and partition_number. index_id | 0 | NULL | -1 | DEFAULT ID of the index. index_id is int. Valid inputs are th...
In the Index tab, you can discover SQL Server index usage information related to overall index usage (such as total fragmentation) and data corresponding to individual indexes. You can also list your SQL Server indexes in Grid or Tree view with customizable columns including type, primary keys,...
The sys.indexes, sys.tables, and sys.filegroups catalog views are queried to verify the index and table placement in the filegroups before and after the move. SQL Copy -- Create a clustered index on the PRIMARY filegroup if the index does not exist. IF NOT EXISTS (SELECT name FROM ...
The sys.indexes, sys.tables, and sys.filegroups catalog views are queried to verify the index and table placement in the filegroups before and after the move.SQL Copy -- Create a clustered index on the PRIMARY filegroup if the index does not exist. IF NOT EXISTS (SELECT name FROM sys...
Limitations and Restrictions Security To create a unique index on a table, using: SQL Server Management Studio Transact-SQL Before You Begin Benefits of a Unique Index Multicolumn unique indexes guarantee that each combination of values in the index key is unique. For example, if a unique index...
addAttribute(String, Object) - Method in class com.endeca.portlet.ModelMap addAttributeToGroup(String, String) - Method in class com.endeca.portal.explore.model.UnivariateSortAndGroupAnalysis addAttrValue(String) - Method in class com.endeca.portal.compare.model.CompareGridRecordModel addBinningSelect...