Question

下面是我的查询。

 CREATE TRIGGER MyTrigger ON CUSTOMERS
    AFTER INSERT
    AS

    if exists ( select * from CUSTOMERS t 
        inner join inserted i on i.name<>t.name or i.age<>t.AGE or i.address<>t.address or i.salary<>t.SALARY
        and i.id = t.id)
    begin
        UPDATE c SET c.name = i.name,    c.age = i.age     c.address=i.address FROM CUSTOMERS as c INNER JOIN inserted i ON c.id = i.id 
    end   go

在此更新语句中，我想更新ID匹配的所有列和行，但是当我尝试插入时，在ID匹配的地方更新了旧行并插入了新记录

Answer 1

如果我是对的，您可以尝试使用内部联接进行更新，如下所示。

CREATE TRIGGER MyTrigger ON CUSTOMERS
AFTER INSERT
AS
if Exists (select * from CUSTOMERS t 
    inner join inserted i on i.id=t.id
    and i.age=t.AGE 
    and i.[address]=t.[address]
    and i.salary=t.SALARY
    and i.id <> t.id)
begin
 UPDATE c
 SET c.name = i.name,  
     c.age = i.age
     --...and so on
 FROM CUSTOMERS as c
 INNER JOIN inserted i ON c.id <> i.id              
end

SQL服务器触发器根据主键更新值

1 个答案: