select name,concat(reftype,'(',length,')'),nullable,ISNULL(descrip,'') descrip
from (
	select distinct 
		A.COLUMN_ID as id, 
		A.column_name name,
		A.data_type reftype,
		A.data_length as length,
		A.NULLABLE as nullable,
		B.comments descrip 
	from 
		user_tab_columns A,
		user_col_comments B
--		all_cons_columns C,
--		USER_TAB_COMMENTS D 
	where 
		a.COLUMN_NAME=b.column_name 
		and A.Table_Name = B.Table_Name 
-- 		and A.Table_Name = D.Table_Name 
-- 		and (A.TABLE_NAME=c.table_name) 
 		and  A.Table_Name='SELECTION_REASON' ORDER BY id 
 	)