mysql嵌套查询例子 mysql嵌套查询语句

select max(id) from( select id,A,B from table1 where A>0 and B>0)t1加个表别名试试

select SKTNO,SUM(XSJE) XSJE FROM XSJL查询每个收款台的总销售金额.

select yr_student_info.name from yr_student_info where yr_student_info.school_id in (select yr_school_info.id from yr_school_info where yr_school_info.province='上海' and yr_school_info.city='上海')

sql语句里有嵌套查询,如:select sname from student where sno inselect sno from sc where cno='2';这样得查询可以实现一条指令对两个表操作可在php里我用这个命令.

1、说明:复制表(只复制结构,源表名:a 新表名:b) (Access可用) 法一:select . select d,e,f from b in '具体数据库' where 条件 例子:..from b in '＂&Server..

你的sql语句中 的 from 和 to 与sql保留关键词 有冲突.select a.train_no, a.sequ_no t_from , b.sequ_no t_to from (select * from aa where st_name= ＂xxx＂ ) as a , (select * from aa where st_name= ＂xx＂) as b where a.train_no = b.train_no and a.sequ_no 评论0 0 0

SELECT * FROM tb_login WHERE userid NOT IN (SELECT userid FROM tb_login LIMIT 5) LIMIT 4这样吧····

单引号问题吧,你的mysql配置不支持这种写法 'group' ,单引号去掉吧.

select a.TerminalName, a.Capability,c.OrganIDfrom t_terminal a,t_vehiclean b,t_useran cwhere a.VehicleID=b.VehicleID and b.OrganID =c.OrganID and c.UserID = ?这样试试,最后的userid=?那自己输入一个值

这个好象直接用JOIN查询就可以了吧.select *from 一个评论的表 a,一个评论的表 b, 一个评论的表 cwhere a.id=b.parentID and b.id=c.parentID