这是我mat_likes表:MySQL的:选择查询
mat_id| yes| no
1 | 1 | 0
1 | 1 | 0
1 | 1 | 0
2 | 1 | 0
3 | 1 | 0
4 | 1 | 0
4 | 1 | 0
如何选择这些材料,它们具有最yes = 1
的mat_id
。减去结果Еxample:
mat_id = 1
,因为有总yes = 3
mat_id = 4
,因为有总yes = 2
mat_id = 3
,因为有总yes = 1
mat_id = 2
,因为有总yes = 1