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:

Function type signature

(<-tables: stream[A], ?column: string) => stream[B] where A: Record, B: Record

Parameters

column

Column to count values in and store the total count.

tables

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

Examples

• Count the number of records in each input table
• Count the number of records with a specific value

Count the number of records in each input table

import "sampledata"

sampledata.string()
    |> 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 =
    sampledata.int()
        |> filter(fn: (r) => r._value > 10)

data
    |> count()