Oracle导出表信息列说明

1、使用pl/sql developer执行一下sql

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 )

2、使用工具导出excel