Oracle查询数据库内全部的表名、列明、注释、数据类型、长度、精度

SELECT a.TABLE_NAME 表名, row_number() over(partition by a.TABLE_NAME order by a.COLUMN_NAME desc) 字段顺序,a.COLUMN_NAME 列名, b.COMMENTS 注释,a.DATA_TYPE 数据类型, a.DATA_LENGTH 长度,DATA_SCALE 精度FROM all_tab_columns a
LEFT JOIN all_col_comments b ON a.OWNER = b.OWNER AND a.TABLE_NAME = b.TABLE_NAME AND a.COLUMN_NAME = b.COLUMN_NAME
WHERE a.OWNER = '用户名'
ORDER BY 表名,字段顺序

效果图：

字段排序，根据表名对字段进行排序