Definition

COUNT counts the number of non-blank values in a column.

Formula

Number of Customers = COUNT('Table'[Customer ID])

Use

When you want to count the non-empty values in a column.

Flowchart

Steps

1. Go to report view

2. Insert a card 

3. drag the newly created measure "Count" from the date pane into card 

4. You will get the count displayed in the card