SELECT t1.Table_Name AS "表名称",  t3.comments AS "表说明",   t1.Column_Name AS "字段名称",  t1.Data_Type AS "数据类型",  t1.Data_Length AS "长度",  t1.NullAble AS "是否为空",  t2.Comments AS "字段说明",  t1.Data_Default "默认值" FROM cols t1 left join user_col_comments t2  on t1.Table_name=t2.Table_name and t1.Column_Name=t2.Column_Name  left join user_tab_comments t3   on t1.Table_name=t3.Table_name   WHERE NOT EXISTS ( SELECT t4.Object_Name FROM User_objects t4  WHERE t4.Object_Type='TABLE'  AND t4.Temporary='Y'  AND t4.Object_Name=t1.Table_Name )  ORDER BY t1.Table_Name, t1.Column_ID;