spread() function

The spread() function outputs the difference between the minimum and maximum values in a specified column. Only uint, int, and float column types can be used. The type of the output column depends on the type of input column:

• For columns with type uint or int, the output is an int
• For columns with type float, the output is a float.

*Function type: Aggregate
**Output data type:* Integer or Float (inherited from input column type)

spread(column: "_value")

Parameters

column

The column on which to operate. Defaults to "_value".

*Data type: String*

Examples

from(bucket: "example-bucket")
  |> range(start: -5m)
  |> filter(fn: (r) =>
    r._measurement == "cpu" and
    r._field == "usage_system"
  )
  |> spread()

Related articles

• InfluxQL – SPREAD()