mysqli中三表联合查询怎么弄

2025-03-24 10:12:49
推荐回答(1个)
回答1:

select a.incode,a.inname,count(c.stzt) as stzt from
industry_infor as a left jion workType_infor as b on a.incode=b.incode
left jion exam_lltk_infor as c on b.workTypeCode = c.workTypeCode
group by a.incode,a.inname