mysql点滴记录
2020-11-09
来源：汇智旅游网
mysql与oracle的确很多区别之处： 多表左链接链接： Select * FROM t1 LEFT JOIN (t2, t3, t4) ON (t2.a=t1.a AND t3.b=t1.b AND t4.c=t1.c) delete别名问题： 如： delete from student a where a.id in (1,2);(执行失败) select a.* from student a where
mysql与oracle的确很多区别之处：
多表左链接链接：
Select * FROM t1 LEFT JOIN (t2, t3, t4) ON (t2.a=t1.a AND t3.b=t1.b AND t4.c=t1.c)
delete别名问题：
如：
delete from student a where a.id in (1,2);(执行失败)
select a.* from student a where a.id in (1,2);(执行成功)
怎么办呢？见下面办法
delete a from student a where a.id in (1,2);
在 delete 后加上 表的别名a 即可删除成功！
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