Help - count infos

[#1]

Guys,

I have developing a QV from excel database and I need to provide a formula that count the number of diferent datas I have in one colun.

Example: Result = 2 (A and B)

Colun A

A

B

A

Please, could someone help me with this issue?

[pover]

The expression would be count(distinct Colun A)

Regards.