我有以下数据:
date, name, bin,group, value
2017-08-19,a1,0,1,302
2017-08-19,a3,0,1,35
2017-08-19,a4,0,1,33
2017-08-19,a6,0,1,43
2017-08-19,p1,0,0,76
2017-08-19,i3,0,0,23
2017-08-19,cl,1,1,73
2017-08-19,c,1,0,2
2017-09-19,a1,0,1,302
2017-09-19,a3,0,1,35
2017-09-19,a4,0,1,33
2017-09-19,a6,0,1,43
2017-09-19,