索引创建在数据表或者视图的字段上,生成索引页,存放于数据库中。 --分类:在SQL Server中,根据索引的作用和存储方式的不同,将索引分为聚集索引和非聚集索引两类。 1)聚集索引:指数据库的物理顺序与被创建索引的字段顺序完全相同。同一个数据表最多只能创建一个聚集索引。默认情况下主键自动被创建为聚集索引。聚集...
通过sys.sql_modules进行查询,也可以通过sys.views, sys.schemas进行连接查询得到视图定义。 18. 刷新视图定义 当视图依赖的对象改变了,那么视图元信息就过期了。使用sp_refreshview去刷新视图定义。 19. 视图加密 为了防止客户端对sql进行反向工程,可以对视图或者存储过程的定义进行加密。这样视图的定义就不可见了。
I can usesys.dm_db_index_physical_statsto view the depth of the B-tree non-clustered index. Remember that a non-clustered index contains only a subset of the columns in the base table and is organized in a B-tree structure. These NC indexes allow for very fast searching of data, ...
如需詳細資訊,請參閱 FILESTREAM (SQL Server)。::=要編製索引的完整或非完整物件。database_name資料庫的名稱。schema_name資料表或檢視所屬之結構描述的名稱。table_or_view_name要建立索引之資料表或檢視的名稱。必須利用 SCHEMABINDING 定義檢視表,才能在該檢視表上建立索引。 必須先在檢視表上建立唯一叢集索引,...
Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by setting options on the index.Transact-SQL syntax conventionsSyntaxSyntax for SQL Server, Azure SQL Database, and Azure SQL Managed Instance....
The view doesn't have to be explicitly referenced in the query for the query optimizer to use it. Databases on primary replicas in Azure SQL Database automatically generate database advisor performance recommendations for indexes. You can optionally enable automatic index tuning. Query Store helps...
Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by setting options on the index.Transact-SQL syntax conventionsSyntaxSyntax for SQL Server, Azure SQL Database, and Azure SQL Managed Instance....
The view doesn't have to be explicitly referenced in the query for the query optimizer to use it. Databases on primary replicas in Azure SQL Database automatically generate database advisor performance recommendations for indexes. You can optionally enable automatic index tuning. Query Store helps ...
当database_name是当前数据库或database_name并且table_or_view_nametempdb以#开头时,SQL 数据库支持由三部分构成的名称格式<database_name>.[schema_name].。REBUILD [ WITH ( <rebuild_index_option> [ ,... n ] ] ]适用于:SQL Server 2012 (11.x) 及更高版本和 Azure SQL 数据库指定使用相同的列...
For more information, see Partitioned Tables and Indexes.PermissionsRequires ALTER permission on the table or view.Using SQL Server Management StudioTo set max degree of parallelism on an indexIn Object Explorer, click the plus sign to expand the database that contains the table on which you ...