Hi ,
Sorry for asking stupid question again ~_~
I wanna group some data :
1 : 000001
2 : 000001
3 : 000003
4 : 000004
5 : 000003

and get a result like that :
1 : 000001
2 : 000003
3 : 000004

Yeah ,as you know ,remove the data if there is already exist
I wanna use for-loop and array to do that ,but it is zero efficiency ,I think .

Any idea ?

Thanx for help ~ ^^