［多表查询］－－求助
请写出在class和stu表中查找满足如下条件的记录的sql语句：
１）表class中的字段c_id与stu表中的s_cid为关联字段
2)返回字段 c_name,s_no,s_name
3)查询条件 c_stu 字段值大于20,并且s_no第二到四位是＂006"这三个字符
4)查询结果按s_no倒排序
谢了~~~~~
以下是引用LouisXIV在2006-9-22 22:19:38的发言：
--test it by yourself please
select c.c_name,s.s_no,s.s_name
from class c inner join stu s
on c.c_id=s.s_cid
where c_stu>20 and substring(rtrim(s_no),2,4)='006'
order by s_no desc
--test it by yourself please
select c.c_name,s.s_no,s.s_name
from class c inner join stu s
on c.c_id=s.s_cid
where c_stu>20 and substring(rtrim(s_no),2,4)='006'
order by s_no desc
where c_stu>20 and s_no like '_006%'
order by s_no desc
使用模糊查询的关键字like～～～