如果使用INSERT,UPDATE以及DELETE单独的语句,你必须建立三个单独的语句从源表匹配的行更新数据到目标表。 但是,SQL Server提供了MERGE允许同时执行三个操作的语句。下面显示了该MERGE语句的语法: MERGE target_table USING source_table ON merge_condition WHEN MATCHED THEN update_statement WHEN NOT MATCHED THEN inse...
sql Copier CREATE PROCEDURE dbo.InsertUnitMeasure @UnitMeasureCode NCHAR(3), @Name NVARCHAR(25) AS BEGIN SET NOCOUNT ON; -- Update the row if it exists. UPDATE Production.UnitMeasure SET Name = @Name WHERE UnitMeasureCode = @UnitMeasureCode -- Insert the row if the UPDATE statement ...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse AnalyticsThe 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 inserting, updating, or deleting ...
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 ...
For every insert, update, or delete action specified in the MERGE statement, SQL Server fires any corresponding AFTER triggers defined on the target table, but doesn't guarantee on which action to fire triggers first or last. Triggers defined for the same action honor the order you specify....
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。
Applies ToSQL Server 2014 Developer - duplicate (do not use) SQL Server 2014 Enterprise - duplicate (do not use) SQL Server 2014 Enterprise Core - duplicate (do not use) SQL Server 2014 Standard - duplicate (do not use) Symptoms When y...
在SQL Server 2008 中,您可以使用 MERGE 语句在一条语句中执行插入、更新或删除操作。MERGE 语句允许您将数据源与目标表或视图联接,然后根据该联接的结果对目标执行多项操作。例如,您可以使用 MERGE 语句执行以下操作: 有条件地在目标表中插入或更新行。
I am weak in sql server isolation and locking hint. i am working with sql server default isolation. i saw when we update a table then table is getting lock instead of row should be locked. i am updating/inserting data with in Begin Tran. Please tell me…
When you run a query by using the MERGE statement in Microsoft SQL Server, you notice that the MERGE statement fails and returns an access violation error at BTreeRow::DisableAccessReleaseOnWait. Status Microsoft has confirmed th...