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...
syntaxsql 複製 [ FROM { <table_source> } [ , ...n ] ] <table_source> ::= { table_or_view_name [ FOR SYSTEM_TIME <system_time> ] [ [ AS ] table_alias ] [ <tablesample_clause> ] [ WITH ( < table_hint > [ [ , ] ...n ] ) ] | rowset_function [ [ AS ] table...
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...
SqlServer.TransactSql.ScriptDom AbortAfterWaitType AcceleratedDatabaseRecoveryDatabaseOption AddAlterFullTextIndexAction AddFileSpec AddMemberAlterRoleAction AddSearchPropertyListAction AddSensitivityClassificationStatement AddSignatureStatement AdHocDataSource AdHocTableReference AffinityKind AlgorithmKeyOption ...
SQL -- Create the table.CREATETABLETestTable (colaINT, colbCHAR(3)); GOSETNOCOUNTON; GO-- Declare the variable to be used.DECLARE@MyCounterINT;-- Initialize the variable.SET@MyCounter =0;-- Test the variable to see if the loop is finished.WHILE (@MyCounter < 26)BEGIN;-- Insert a...
Clustered columnstore index: Data Load Optimization - Parallel Bulk Import Features of In-Memory OLTP Let's look at the main features of In-Memory OLTP. Memory-optimized tables The T-SQL keyword MEMORY_OPTIMIZED, on the CREATE TABLE statement, is how a table is created to exist in active me...
Consider that in all other non SQL languages, we have to use a temporary variable to swap values between two variables. If we want to see the problem from the non SQL programmer, we should do something like this prototype: update Person set @swap=Firstname set Firstname=Lastname set last...
<table_source> 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 expressio...
SqlServer.TransactSql.ScriptDom AbortAfterWaitType AcceleratedDatabaseRecoveryDatabaseOption AddAlterFullTextIndexAction AddFileSpec AddMemberAlterRoleAction AddSearchPropertyListAction AddSensitivityClassificationStatement AddSignatureStatement AdHocDataSource AdHocTableReference AffinityKind AlgorithmKeyOption Allow...