select a.xm,b1.name as km1,b2.name as km2,b3.name as km3 from a left join b b1 on (a.km1=b1.code) left join b b2 on (a.km2=b2.code) left join b b3 on (a.km3=b3.code)
17,377
社区成员
95,128
社区内容
加载中
试试用AI创作助手写篇文章吧