docs-v2/content/influxdb/v2/query-data/flux/exists.md

title	seotitle	list_title	description	influxdb/v2/tags	menu	weight	aliases	related	list_code_example	source
Check if a value exists	Use Flux to check if a value exists	Exists	Use the Flux `exists` operator to check if a row record contains a column or if that column's value is `null`.	exists	influxdb_v2 name parent Exists Query with Flux	220	/influxdb/v2/query-data/guides/exists/	/influxdb/v2/query-data/flux/query-fields/ /flux/v0/stdlib/universe/filter/	##### Filter null values ```js data |> filter(fn: (r) => exists r._value) ```	/shared/influxdb-v2/query-data/flux/exists.md