My database:
我的数据库:
+++++++++++++++++++++++++++++++++++++
+ id | group_id | inside_id | value +
+ 1 | 1 | 1 | 50 +
+ 2 | 1 | 2 | 12 +
+ 3 | 1 | 1 | 4 +
+ 4 | 2 | 3 | 140 +
+ 5 | 2 | 2 | 81 +
+ 6 | 2 | 3 | 24 +
+++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++
