The NOT keyword can be placed either at the start of the argument or in the operator.
WHERE MyColumn NOT IN (Value1, Value2, Value3)
/*is the same as*/
WHERE NOT MyColumn IN (Value1, Value2, Value3)
Notes on Salesforce Marketing Cloud & Martech
The NOT keyword can be placed either at the start of the argument or in the operator.
WHERE MyColumn NOT IN (Value1, Value2, Value3)
/*is the same as*/
WHERE NOT MyColumn IN (Value1, Value2, Value3)