现在要查找所有具有相同的title和address的人 代码如下:select star1.name,star2.name,star1.title,star1.address from movestar as star1,movestar as star2 where star1.title = star2.title     and star1.address = star2.address     and star1.name
这是一张物料库存的表,有两个库存,甲供物料,乙供物料。 SELECT *,(IFNULL(a_number,0) + IFNULL(b_number,0)) AS stock FROM `materiel_storage`;//注意IFNULL判空
表数据如下: 问:比如这张表我要找出同时满足relevance_id_为00000000000000000001002100040000和00000000000000000001002100030000的abstract_id_应该怎么做? select abstract_id_,count(abstract_id_) as total_ from note_abstract_rel...