count - Count the number of rows in a set.

The count operator returns a single row, that represents a count of the results.

Syntax

count [into <keypath>]

If we have a log document that represents HTTP requests, we can use a simple count to tally them up:

filter status_code != null 
| count

This will return a single numeric value. We can also alias this field for better readability:

filter status_code != null 
| count into http_request_count

Now, our document that we get back will look like this:

{ "http_request_count": 1242 }