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关于Access数据库三表联合查询的问题!-

2008-03-20 09:54:22| 分类：默认分类 | 标签： |举报 |字号大中小订阅

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三个表如下
表A
a_ID;a_Name;a_typeCode
表B
b_ID;b_TypeName
表C
c_Id;a_ID;c_Text;c_Time;

这三个表联合查询.要求显示一下内容,a_ID,a_Name,b_TypeName,c_time;
而且这要用C_Time作为排序第一条件,a_ID作为第二排序条件,都是倒序;
C表中a_Id可能又很多项等于A表的a_ID,也有可能一个都没有.

SELECT *
FROM (a LEFT JOIN b ON a.a_typeCode = B.b_ID) left JOIN (select c.a_id,max(c.c_time) from c GROUP BY c.a_id ) as t on a.a_ID= t.a_ID;

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