CREATE INDEX 既可以创建一个可改变表的物理顺序的簇索引,也可以创建提高查询性能的非簇索引。其语法如下: CREATE [UNIQUE] [CLUSTERED | NONCLUSTERED] INDEX index_name ON {table | view } column [ ASC | DESC ] [,...n]) [WITH [PAD_INDEX] [ [, ] FILLFACTOR = fillfactor] [ [, ] IGNORE_D...
重要 在SQL Server 的未来版本中,将删除此后向兼容的关系索引语法结构。请避免在新的开发工作中使用此语法结构,并计划修改当前使用此功能的应用程序。改用 <relational_index_option> 中指定的语法结构。syntaxsql 复制 CREATE [ UNIQUE ] [ ...
Sql Server创建主键失败:CREATE UNIQUE INDEX 终止,因为发现对象名称 '[PPR_BasicInformation]' 和索引名称 '[PK_PPR_BasicInformation]' 有重复的键(E) 这种问题是由于主键设置了唯一性,而数据库中主键列的值又有重复的值,重复值为E,改掉其中一个值就可以了。
After a unique clustered index has been created on a view, nonclustered indexes can be created. For more information, seeCreate indexed views. Security Permissions Requires ALTER permission on the table or view. User must be a member of thesysadminfixed server role or thedb_ddladminanddb_owner...
SQL SERVER中用CREATE INDEX 命令创建索引 阅读更多 CREATE INDEX 既可以创建一个可改变表的物理顺序的簇索引,也可以创建提高查询性能的非簇索引。其语法如下: CREATE [UNIQUE] [CLUSTERED | NONCLUSTERED] INDEX index_name ON {table | view } column [ ASC | DESC ] [,...n])...
For more information, see the REBUILD option for ALTER INDEX (Transact-SQL). Non-unique indexes. Filtered indexes can be non-unique, whereas indexed views must be unique. Filtered indexes are defined on one table and only support simple comparison operators. If you need a filter expression ...
Syntax for SQL Server, Azure SQL Database, Azure SQL Managed Instancesyntaxsql Copy CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON ( column [ ASC | DESC ] [ ,...n ] ) [ INCLUDE ( column_name [ ,...n ] ) ] [ WHERE <filter_predicate> ] [ WITH ( ...
Multiple unique nonclustered indexes can be defined on a table. For more information, see CREATE INDEX (Transact-SQL). Indexed view To create an indexed view, a unique clustered index is defined on one or more view columns. The view is executed and the result set is stored in the leaf ...
Storage-align non-unique indexes and unique indexes with an indexed partition column Aligns all indexes of the table that are partitioned with the same partition scheme. When a table and its indexes are aligned, you can move partitions in and out of partitioned tables more effectively, because...
For more information, see the REBUILD option for ALTER INDEX (Transact-SQL). Non-unique indexes. Filtered indexes can be non-unique, whereas indexed views must be unique. Filtered indexes are defined on one table and only support simple comparison operators. If you need a filter expression ...