SQL Server、Azure SQL Database、Azure SQL 受控執行個體的語法syntaxsql 複製 CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON ( column [ ASC | DESC ] [ ,...n ] ) [ INCLUDE ( column_name [ ,...n ] ) ] [ WHERE <filter_predicate> ] [ WITH ( <relational...
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...
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。 分类:DB_Sql Server...
A unique index can be filtered a constraint cannot. "SQL Server forces any clustered indexes to be unique ... you can still insert duplicate rows if you want, but SQL Server adds a suffix to the key internally to ensure that the row has a unique identifier" so why can't non clustered...
A filtered index is an optimized disk-based rowstore nonclustered index especially suited to cover queries that select from a well-defined subset of data.
Applies to:SQL ServerAzure SQL DatabaseAzure SQL Managed Instance This article describes how to create indexes on a view. The first index created on a view must be a unique clustered index. After the unique clustered index has been created, you can create more nonclustered indexes. Creating ...
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])...
Applies to: SQL Server Azure SQL Database Azure SQL Managed InstanceThis article describes how to create indexes on a view. The first index created on a view must be a unique clustered index. After the unique clustered index has been created, you can create more nonclustered indexes. Creatin...
CREATE UNIQUE NONCLUSTERED INDEX [NCI_CountryId] ON [Ref].[Country] ( [CountryId] ASC ) INCLUDE ([CountryName]) As you can see in below image, there is two NCI on same column that is CountryId, one is created by default while creating a table(PK_Country) and another ...