MYSQL GROUP BY two colums same table

前端 未结 0 822
遥遥无期
遥遥无期 2020-12-05 20:38

i am trying to get this from a query by adding from the same table and using case. Unfortunately I cannot get the desired result. Where am I wrong? thanks.

+-         


        
相关标签:
回答
  • 消灭零回复
提交回复
热议问题