Hello again, this is the challenge (my apologize for my English, I'm still learning):
I have columns of data information ( 45 columns, 4000 or more of rows data), the first column that I need has a lot of customer's account numbers and user names, and I want to retrieve the following:
1. Which user did the first register (the customer appears several times)
2. Which user did the last register (touched the same account, in the same day)
3. It has column time and date (9/23/11 15:38:24)
4. Data are not in order of dates.
¿How can i know which user did the first and last register, knowing this: the information that i need, is in the middle of other same registers?
Example:
Column A Column B
234536A A1 (9/23/11 14:16:34)
234536A A2 (8/12/11 11:16:34)
234536A A3 (10/02/11 14:16:34)
234536A A4 (9/23/11 18:16:34)
I've tried using vlookup with Max/Min or Large/Short, and it's failure.
I'll be really appreciated if you help me with this problem.