query: SELECT template_type_code FROM Templates EXCEPT SELECT template_type_code FROM Templates AS T1 JOIN Documents AS T2 ON T1.template_id  =  T2.template_id
question: Are Showing all template type that ain't used them any document codes.
query_toks: SELECT template_type_code FROM Templates EXCEPT SELECT template_type_code FROM Templates AS T1 JOIN Documents AS T2 ON T1.template_id = T2.template_id
query_toks_no_value: select template_type_code from templates except select template_type_code from templates as t1 join documents as t2 on t1 . template_id = t2 . template_id
question_toks: Are Showing all template type that ain't used them any document codes.