以下为原始表格的格式:
列1     列2             列3
1 MTEP1209-0216S TEP12090292
1 MTEP1209-0216S TEP12090288
1 MTEP1209-0216S TEP12090290
2 MTEP1211-0013B TEP13010005
2 MTEP1211-0013B TEP12110060
3 MTSP1211-0030B TSP13040001
3 MTSP1211-0030B TSP12120002
3 MTSP1211-0030B TSP12110032
3 MTSP1211-0030B TSP12110030
如何增加一列为自增的列,如下
列1     列2             列3          列4
1 MTEP1209-0216S TEP12090292  1
1 MTEP1209-0216S TEP12090288  2
1 MTEP1209-0216S TEP12090290  3
2 MTEP1211-0013B TEP13010005  1
2 MTEP1211-0013B TEP12110060  2
3 MTSP1211-0030B TSP13040001  1
3 MTSP1211-0030B TSP12120002  2
3 MTSP1211-0030B TSP12110032  3
3 MTSP1211-0030B TSP12110030  4
请高手指教....