(2) 单击任务板中的“Create an Index” 链接,出现如图8-3 所示的索引创建向导界面。也可以从“Tools ”菜单中选择“izards” 菜单项,则出现如图5-17 所示的选择SQL Server 向导对话框,再从树型目录中选择“Database”下的“Create Index Wizard”选项,也会出现如图8-3 所示的索引创建向导界面。 (3) 单击...
(2) 单击任务板中的“Create an Index” 链接,出现如图8-3 所示的索引创建向导界面。也可以从“Tools ”菜单中选择“izards” 菜单项,则出现如图5-17 所示的选择SQL Server 向导对话框,再从树型目录中选择“Database”下的“Create Index Wizard”选项,也会出现如图8-3 所示的索引创建向导界面。 (3) 单击...
SQL 复制 CREATE UNIQUE INDEX index1 ON schema1.table1 (column1 DESC, column2 ASC, column3 DESC); 主要方案: 从Azure SQL 数据库和 Azure SQL 托管实例中的 SQL Server 2016(13.x)开始,可以在列存储索引上使用非聚集索引来提高数据仓库查询性能。 有关详细信息,请参阅 列存储索引 - 数据仓库。
You can define a primary key in the SQL Server Database Engine by using SQL Server Management Studio or Transact-SQL. Creating a primary key automatically creates a corresponding unique clustered index. However, your primary key can be specified as a nonclustered index instead....
To create a unique index on a table, using: SQL Server Management Studio Transact-SQLBefore You BeginBenefits of a Unique IndexMulticolumn unique indexes guarantee that each combination of values in the index key is unique. For example, if a unique index is created on a combination of LastNa...
CREATE COLUMNSTORE INDEX converts a rowstore table to a clustered columnstore index, or creates a nonclustered columnstore index.
Ordered clustered columnstore indexes were introduced in SQL Server 2022 (16.x). For more information, see CREATE COLUMNSTORE INDEX. For ordered columnstore index availability, see Columnstore indexes: Overview. Starting with SQL Server 2016 (13.x), you can create the table as a clustered colu...
An index created as part of the constraint is automatically given the same name as the constraint name. For more information, seePrimary and Foreign Key ConstraintsandUnique constraints and check constraints. Index independent of a constraint
An index created as part of the constraint is automatically given the same name as the constraint name. For more information, seePrimary and Foreign Key ConstraintsandUnique constraints and check constraints. Index independent of a constraint
Review the required SET options for filtered index creation in CREATE INDEX (Transact-SQL) syntax Filters can't be applied to primary key or unique constraints, but can be applied to indexes with the UNIQUE property. You can't create a filtered index on a computed column. Permissions Requires...