Formula for Count unique values

[oimamoglu]

Is there any formula to count unique cell values? I will use this for docs dashboard.

[oimamoglu]

I find a part o solution. Unique values of colums can be calculated.
Solution: right click on coloums and "summurize coloums" and "count unique values".
Not Solved : How can I add this value an dashboard page?

[avalynn1133]

You can use Summarize → Count unique values for basic needs.

Using a formula to count unique values isn’t supported yet — it gives #REF!.