SELECT T1.detention_type_code ,  T2.detention_type_description FROM Detention AS T1 JOIN Ref_Detention_Type AS T2 ON T1.detention_type_code  =  T2.detention_type_code GROUP BY T1.detention_type_code ORDER BY count(*) ASC LIMIT 1
What are the code and description of the least frequent detention type ?
SELECT T1.detention_type_code , T2.detention_type_description FROM Detention AS T1 JOIN Ref_Detention_Type AS T2 ON T1.detention_type_code = T2.detention_type_code GROUP BY T1.detention_type_code ORDER BY count ( * ) ASC LIMIT 1
select t1 . detention_type_code , t2 . detention_type_description from detention as t1 join ref_detention_type as t2 on t1 . detention_type_code = t2 . detention_type_code group by t1 . detention_type_code order by count ( * ) asc limit value
What are the code and description of the least frequent detention type ?