CREATEEVENTSESSIONMergeIntoPerformanceONSERVERADDEVENT sqlserver.merge_statement_start,ADDEVENT sqlserver.merge_statement_completeADDTARGET package0.event_file(SETfilename=N'MergeIntoPerformance.xel')WITH(MAX_MEMORY=4096KB,EVENT_RETENTION_MODE=ALLOW_SINGLE_EVENT_LOSS,MAX_DISPATCH_LATENCY=30SECONDS,MAX_EVENT_...
In this article, I am going to give a detailed explanation of how to use the SQL MERGE statement in SQL Server. TheMERGEstatement in SQL is a very popular clause that can handle inserts, updates, and deletes all in a single transaction without having to write separate logic for each of ...
在Merge Not Matched 操作中,只允许执行 INSERT 语句。 一个Merge 语句中出现的 Matched 操作,只能出现一次 UPDATE 或者 DELETE 语句,否则就会出现下面的错误 -An action of type 'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. Merge 语句最后必须包含分号,以 ; 结...
CREATEPROCEDUREdbo.InsertUnitMeasure @UnitMeasureCodeNCHAR(3), @NameNVARCHAR(25)ASBEGINSETNOCOUNTON;-- Update the row if it exists.UPDATEProduction.UnitMeasureSETName= @NameWHEREUnitMeasureCode = @UnitMeasureCode-- Insert the row if the UPDATE statement failed.IF(@@ROWCOUNT =0)BEGININSERTINTOPr...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics SQL database in Microsoft FabricThe MERGE statement runs insert, update, or delete operations on a target table from the results of a join with a source table. For example, synchronize two tables by ...
一个Merge 语句中出现的 Matched 操作,只能出现一次 UPDATE 或者 DELETE 语句,否则就会出现下面的错误 - An action of type 'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. Merge 语句最后必须包含分号,以 ; 结束。
在Oracle中执行Merge Into操作时运行时间较长可能是由于以下原因: 1. 数据量较大:如果合并的表中包含大量数据,执行Merge Into操作可能会花费较长的时间。这可能需要优化查询语句...
You may receive the following error message when you run a MERGE statement in Microsoft SQL Server 2008: Msg 8672, Level 16, State 1, Line 1 The MERGE statement attempted to UPDATE or DELETE the same row more than once. This happens when ...
[MSSQL]SQL Server 2008 Using the MERGE statement ‘MERGE’ statement is a new feature in SQL Server 2008. It can be used to perform insert, update and delete operation on a destination table simultaneously based on the results of a join with a source table. Well, it sounds like a bit ...
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