How can I use COUNTD function in Tableau

Question

Sample Data:

Col1 Col2
A   x
A   x
A   y
B   x
C   z

What I want?

I just want to represent the (Col1) on a graph in the X-axis to the unique references of the data(Col2) on the Y axis

I need something similar like, A (2) ; B (1) ; C (1).

Can someone tell me how can I use COUNTD function in this case?

Answer 1

First add Col1 to the Columns shelf.

Then place COUNTD(Col2) in the Rows shelf & then right click it and select Measure / Count (Distinct).)

That will give you a bar chart by default.

Just in case if you have a table, place COUNTD(Col2) into the Text shelf instead.