count() function

count() returns the number of records in each input table.

The function counts both null and non-null records.

Empty tables

count() returns 0 for empty tables. To keep empty tables in your data, set the following parameters for the following functions:

filter()onEmpty: "keep"
window()createEmpty: true
aggregateWindow()createEmpty: true
Function type signature
(<-tables: stream[A], ?column: string) => stream[B] where A: Record, B: Record
For more information, see Function type signatures.



Column to count values in and store the total count.


Input data. Default is piped-forward data (<-).


Count the number of records in each input table

import "sampledata"

    |> count()

Count the number of records with a specific value

  1. Use filter() to filter data by the specific value you want to count.
  2. Use count() to count the number of rows in the table.
import "sampledata"

data =
        |> filter(fn: (r) => r._value > 10)

    |> count()

View example input and output

Was this page helpful?

Thank you for your feedback!

Introducing InfluxDB 3.0

The new core of InfluxDB built with Rust and Apache Arrow. Available today in InfluxDB Cloud Dedicated.

Learn more

State of the InfluxDB Cloud Serverless documentation

The new documentation for InfluxDB Cloud Serverless is a work in progress. We are adding new information and content almost daily. Thank you for your patience!

If there is specific information you’re looking for, please submit a documentation issue.