做数据清理的时候遇到一个问题如下:
app4 _merge id
1 matched (3) 09991
0 using only (2) 09991
0 using only (2) 09991
0 using only (2) 09990
0 using only (2) 09990
0 using only (2) 09990
0 using only (2) 09990
想对id与_merge==3对应的id相同的变量进行标记app4=1
即想得到:
app4 _merge id
1 matched (3) 09991
1 using only (2) 09991
1 using only (2) 09991
0 using only (2) 09990
0 using only (2) 09990
0 using only (2) 09990
0 using only (2) 09990
对编程比较不在行,求教