曾经用access生成一个超复杂的sql语句,用了很多left join ...on ,然后检索的每一个字段都必须加上group by,任何一个去掉都产生错误,我一直不明白为什么这样,然后昨天在csdn上面提问了,但是还是没能明白.今天再次用两表连接查询然后group by,好像页必须所有检索字段都加入才成.
eg:
select supplier.id as supplierid,supplier.shortname as supplier from supplier,dingdan_product where supplier.id=[dingdan_product].supplierid and [dingdan_product].dingdanid=4 group by dingdan_product.supplierid,supplier.id,supplier.shortname