What are the expected search results from executing the following SPL command?

Every event in the network index that does not have a value in this field.

Every event in the network index that does not contain a StatusCode of 200 and excluding events that do not have a value in this field.

Every event in the network index that does not contain a StatusCode of 200, including events that do not have a value in this field.

No results as the syntax is incorrect, the != field expression needs to be used instead of the NOT operator.