mysql查询(七) [数据库教程]

database

查询学过「张三」老师授课的同学的信息

多表联合查询     

and(和)

第一种:

命令:select ex_xueshengbiao_95.Sid,ex_xueshengbiao_95.Sname,ex_xueshengbiao_95.Sage,ex_xueshengbiao_95.Ssex

from ex_xueshengbiao_95,ex_kechengbiao_95, ex_jiaoshibiao_95,ex_chengjibiao_95

where ex_kechengbiao_95.Tid=ex_jiaoshibiao_95.Tid

and ex_kechengbiao_95.Cid=ex_chengjibiao_95.Cid

and ex_chengjibiao_95.Sid=ex_xueshengbiao_95.Sid

and ex_jiaoshibiao_95.Tname=‘张三‘

 

 

(2)第二种

 

命令:select * from ex_xueshengbiao_95

 

where Sid in (select Sid from ex_chengjibiao_95

 

where Cid in (select Cid from ex_kechengbiao_95

 

where Tid in (select Tid from ex_jiaoshibiao_95

 

where Tname=‘张三‘)))

 

 

 

 

 

 

mysql查询(七)

以上是 mysql查询(七) [数据库教程] 的全部内容, 来源链接: utcz.com/z/535030.html

回到顶部