对比MySQL与SQL SERVER2005的触发器写法_MySQL
SQLServer2005
bitsCN.com对比MySQL与SQL SERVER2005的触发器写法
最近给从前的项目做了数据库的移植,发现不同公司的产品,还真是差别甚大啊。
下面是原来用在MS SQL2005上的一个触发器:
Sql代码
CREATE TRIGGER [TG_Update_Current] ON [dbo].[CurrentLocation]
FOR UPDATE
AS
BEGIN
INSERT INTO dbo.HistoryLocation
SELECT c.cl_time,c.lo_phone,c.cl_lng,c.cl_lat
FROM inserted i,CurrentLocation c
WHERE i.lo_phone=c.lo_phone
END
go
移植到MySQL 5.01上就成这样子了:
Sql代码
drop trigger if exists TG_Update_Current ;
delimiter|
createtrigger TG_Update_Current
after update ON CurrentLocation
for each row begin
insert into HistoryLocation(lo_phone,hl_lng,hl_lat,hl_time)
select NEW.lo_phone, NEW.cl_lng, NEW.cl_lat, NEW.cl_time
end|
delimiter;
对比下,除了语法的差异,最大的不适应还是人性化问题,MYSQL的触发器格式就得依上面得写法,你搞错一个词的位置都报错,对官方的文档参详了许久,才发现错误提示中syntax error就是“格式问题”。

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