dfr expr-not for expression> dfr expr-not {flags} 
| input | output | 
|---|---|
| any | any | 
Creates a not expression
> (dfr cola) >2)|dfr expr-not
Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe flag
    Copyright © 2019–2023 The Nushell Project DevelopersLicensed under the MIT License.
    https://www.nushell.sh/commands/docs/dfr_expr-not.html