Oracle 批量获得数据库中表字段，类型说明，列注释等

select distinct t1.TABLE_NAME,--表名
t1.COLUMN_NAME,--列名
t1.DATA_TYPE,--列类型
t1.DATA_LENGTH,--列长度
t1.NULLABLE,--是否可以为空
t1.COLUMN_ID,--列创建的时候顺序
t2.COMMENTS,--表的注释
t3.COMMENTS --列的注释
from user_tab_columns t1, user_tab_comments t2, user_col_comments t3
where t1.TABLE_NAME = t2.TABLE_NAME
and t1.COLUMN_NAME = t3.COLUMN_NAME
and t1.TABLE_NAME = t3.TABLE_NAME
--查询表名以xx开头的所有表
and t1.TABLE_NAME like 'OMS%'
order by t1.TABLE_NAME, t1.COLUMN_ID