如果指定的索引名称已经存在,SQL Server 将显示一个错误。 ONLINE = {ON |OFF}:表示建立索引时是否允许正常访问,即是否对表进行锁定。默认为 OFF。 ON 它将强制表对于一般的访问保持有效,并且不创建任何阻止用户使用索引和/表的锁。 OFF 对索引操作将对表进行表锁,以便对表进行完全和有效的访问...
索引主要目的是提高了SQL Server系统的性能,加快数据的查询速度与减少系统的响应时间 。 但是索引对于提高查询性能也不是万能的,也不是建立越多的索引就越好。索引建少了,用 WHERE 子句找数据效率低,不利于查找数据。索引建多了,不利于新增、修改和删除等操作,因为做这些操作时,SQL SERVER 除了要更新数据表本身,还...
table_or_view_name要为其建立索引的表或视图的名称。必须使用 SCHEMABINDING 定义视图,才能为视图创建索引。 必须先为视图创建唯一的聚集索引,才能为该视图创建非聚集索引。 有关索引视图的详细信息,请参阅“备注”部分。从SQL Server 2016 (13.x) 开始,该对象可以是聚集列存储索引存储的表。
SQL Server、Azure SQL 数据库和Azure SQL 托管实例的语法。syntaxsql 复制 ALTER INDEX { index_name | ALL } ON <object> { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> [ , ...n ] ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_index_...
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....
SQL Server、Azure SQL 資料庫 和 Azure SQL 受控執行個體 的語法。syntaxsql 複製 ALTER INDEX { index_name | ALL } ON <object> { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> [ , ...n ] ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_...
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....
SQL Server、Azure SQL 資料庫 和 Azure SQL 受控執行個體 的語法。syntaxsql 複製 ALTER INDEX { index_name | ALL } ON <object> { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> [ , ...n ] ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_...
For more information about the editions of SQL Server that support parallel index operations, see Editions and supported features of SQL Server 2022.Because a shared (S) lock or a schema modification (Sch-M) lock is held in the final phase of the index operation, be careful when yo...
For more information, see XML indexes (SQL Server). SQL Server 2012 SP1 introduced a new type of XML index known as a Selective XML Index. This new index can improve querying performance over data stored as XML, allow for faster indexing of large XML data workloads, and improve scalability...