Socrata was acquired by Tyler Technologies in 2018 and is now the Data and Insights division of Tyler. The platform is still powered by the same software formerly known as Socrata but you will see references to Data & Insights going forward.

not_in

Function: #NOT_IN
  Whether or not a value is absent from a set of other values

  Examples:

    1 not in (1, 2, 3) -- false

    some_column not in ('a', 'b', 'c')
Signatures
a -> checkbox