SQL Server ON DELETE触发器

Question

我正在尝试创建一个基本数据库触发器,当删除database2.table2中的一行时,该触发器有条件地从database1.table1中删除行.我是触发器的新手,并希望学习实现这一目标的最佳方法.这就是我到目前为止所拥有的.建议？

CREATE TRIGGER sampleTrigger
    ON database1.dbo.table1
    FOR DELETE
AS
    IF EXISTS (SELECT foo
               FROM database2.dbo.table2
               WHERE id = deleted.id
               AND bar = 4)

-- If there is a row that exists in database2.dbo.table2 
-- matching the id of the deleted row and bar=4, delete 
-- it as well.

-- DELETE STATEMENT?

GO

Answer 1

CREATE TRIGGER sampleTrigger
    ON database1.dbo.table1
    FOR DELETE
AS
    DELETE FROM database2.dbo.table2
    WHERE bar = 4 AND ID IN(SELECT deleted.id FROM deleted)
GO

Answer 2

更好用:

DELETE tbl FROM tbl INNER JOIN deleted ON tbl.key=deleted.key