This seems like it should have an easy solution, but I can't for the life of me find it. I want to query out all features in a layer that do not have a value. I did not create the data, all the features already have their attributes filled in, and there is no "null" value in the blank field I want to query. If I try to just say FIELD is not null in the definition query, everything still shows up including all the features with blank FIELD.