You cannot create a non-clustered index on a table variable, unless the index is a side effect of a PRIMARY KEY or UNIQUE constraint on the table (SQL Server enforces any UNIQUE or PRIMARY KEY constraints using an index). Also, SQL Server does not maintain statistics on a table variable,...
)CREATENONCLUSTEREDINDEXIX_#1_NrON#1(NrASC)GOSELECTB.NAMEASTABLENAME , A.object_id, a.name , a.index_id , a.typeFROMSYS.indexesASAINNERJOINSYS.TABLESASBONA.OBJECT_ID=B.OBJECT_IDWHEREB.NAMELIKE'#1[_]%'ORDERBYB.CREATE_DATEASC/*从返回的结果,我们看到在系统视图表SYS.INDEXS中,创建有两个...
sql中declare声明变量_什么是变量说明 变量的申明 declare @local_variable data_type eg...向数据库中批量插入数据** declare @index int=175 //变量申明 while @index <235 //循环条件 begin insert...//插入数据 values(@index+1,@index,1,null,'qbody',4,'A','','','') set @index = @index...
SELECT @nIndexID = indid FROM sysindexes WHERE id = @nTableID AND indid BETWEEN 1 And 254 AND (status & 2048) = 2048 ORDER BY indid IF (@nIndexID Is Null) RETURN 0 We now assign the Index ID of the table's primary key index to the variable @nIndexID. The twelfth bit (2048...
DataModificationTableReference DataRetentionTableOption DataTypeReference DataTypeSequenceOption DbccCommand DbccNamedLiteral DbccOption DbccOptionKind DbccStatement DeallocateCursorStatement DeclareCursorStatement DeclareTableVariableBody DeclareTableVariableStatement ...
Index option Index option Only one index option is supported - BUCKET_COUNT for HASH indexes. Nonclustered Hash Indexes The following table lists the Transact-SQL features and keywords that can appear in the message text of an error involving a nonclustered hash index, as well as the corrective...
Specifies a table, view, table variable, or derived table source, with or without an alias, to use in the Transact-SQL statement. Up to 256 table sources can be used in a statement, although the limit varies depending on available memory and the complexity of other expressions in the query...
DELETE). A new OUTPUT clause allows you to request that the old/new images of the columns be returned by referring to the INSERTED and DELETED tables, similar to the way you refer to them in triggers. You can even specify an INTO clause and direct the output to a table variable. Anoth...
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