我正在使用一个mySQL数据库中的5个表。系统是这样的,我有一个名为"owners“(客户)的顶层表,它具有本地业务(商店)。选择citation_sources.name,citation_shop.shop from citation_sources left join citation_shop on citation_sources.id= citation_shop.citation和citation_shop.shop in (6,7) left join shops on citation_shop.shop = s