CREATE TRIGGER 名2 ON dbo.t1
FOR update
AS
if update(t1name)
update db2..t2 set t1name=aa.t1name from inserted aa where aa.t1id=db2..t2.t2id
FOR update
AS
if update(t1name)
update db2..t2 set t1name=aa.t1name from inserted aa where aa.t1id=db2..t2.t2id
... from inserted as aa ....