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...
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 action to resolve the error. TypeNameResolution OptionASC/DESCNonclustered hash indexes are not ordered. Remove the keywo...
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...
DataModificationTableReference DataRetentionTableOption DataTypeReference DataTypeSequenceOption DbccCommand DbccNamedLiteral DbccOption DbccOptionKind DbccStatement DeallocateCursorStatement DeclareCursorStatement DeclareTableVariableBody DeclareTableVariableStatement ...
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...
SqlServer.TransactSql.ScriptDom Microsoft.SqlServer.TransactSql.ScriptDom AbortAfterWaitType AcceleratedDatabaseRecoveryDatabaseOption AddAlterFullTextIndexAction AddFileSpec AddMemberAlterRoleAction AddSearchPropertyListAction AddSensitivityClassificationStatement AddSignatureStatement AdHocDataSource AdHocTableRef...
The following example shows the SQL Server syntax that runs a stored procedure or function. [ { EXEC | EXECUTE } ] { [ @return_status = ] { module_name [ ;number ] | @module_name_var } [ [ @parameter = ] { value | @variable [ OUTPUT ] | [ DEFAULT ]...