有没有办法强制触发器在多行更新语句上运行？

Question

我不得不对触发器进行更改，并假定运行如下更新查询会使触发器对所有匹配的行执行。但是，它只会更新它找到的记录。

UPDATE someTable SET someField = someField WHERE someField = 'something'; 

作为一个快速的解决方案，我用游标来遍历记录并更新每一行创建下面的查询。它有效，幸运的是我没有一个非常大的数据集，所以它不需要太长的时间，但它看起来并不是最好的解决方案。

DECLARE @id INT; 
DECLARE queryCursor CURSOR FOR 
SELECT id FROM someTable WHERE someField='something' 

OPEN queryCursor 
FETCH NEXT FROM queryCursor INTO @id 
WHILE @@FETCH_STATUS = 0 
BEGIN 
UPDATE someTable SET someField = someField WHERE id = @id 
FETCH NEXT FROM queryCursor INTO @id 
END 

CLOSE queryCursor 
DEALLOCATE queryCursor 

有没有更好的方法来获得在SQL Server中的多行执行触发器？

编辑：从触发代码

FOR INSERT, UPDATE 
AS 
IF UPDATE (LineNumber) 
OR UPDATE(LineService) 

Begin 

DECLARE @CDL VARCHAR(50) 
DECLARE @LN VARCHAR(100) 
DECLARE @A VARCHAR(25) 

SELECT @CDL = CommonDataLink FROM INSERTED 
SELECT @A = LineService FROM INSERTED 

SET @LN = @CDL + @A 

UPDATE CommonData SET ReportedLineNo = @LN WHERE CommonDataLink = @CDL 

End 

Answer 1

你必须要使用特殊的表INSERTED的你想要的东西：

更新的代码

FOR INSERT, UPDATE 
AS 
IF UPDATE (LineNumber) 
OR UPDATE(LineService) 

Begin 

DECLARE @CDL VARCHAR(50) 
DECLARE @LN VARCHAR(100) 
DECLARE @A VARCHAR(25) 

SELECT @CDL = CommonDataLink FROM INSERTED 
SELECT @A = LineService FROM INSERTED 

SET @LN = @CDL + @A 

UPDATE A 
SET ReportedLineNo = B.LineService + B.CommonDataLink 
FROM CommonData A 
INNER JOIN INSERTED B 
ON A.CommonDataLink = B.CommonDataLink 


End