问题
I am a beginner in Tableau. I have successfully connected Tableau with Cassandra.
I am facing an issue now. I am trying to get the distinct count (unique) value from a given column.. The database which I have is like 17 million. (Cassandra DB)
I even tried count (Distinct) as shown above. But it is not working as expected.
Can anyone help me out with this? Thanks in advance.
来源：https://stackoverflow.com/questions/32889949/finding-the-distinct-count-from-a-cassandra-column-using-tableau