How do I count rows in Trevor? The count function counts the total number of rows containing each of the distinct values in a specific column.

For example, you might want to count how many reservations each care make has. To do this, you would click the summarize button, with reservations as the metric and make as the dimension:

To see the number of reservations associated with each of the car brands on each of the pick up days, you would calculate the count broken down by the pick up and also the make column: