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

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

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