计算Oracle SQL中2个日期/时间之间的差异（已更新）

Question

----extract( month from diff) "month",------(adding this line gives error to the original code) 

select extract( day from diff ) Days, 
       extract( hour from diff ) Hours, 
       extract( minute from diff ) Minutes 
from (
    select (CAST(creation_date as timestamp) - CAST(old_creation_date as timestamp)) diff   
    from [Table Name] 
 );

这段代码很容易理解。但有人可以在我尝试代码时解释如何计算月份，它给了我以下错误：

  

ORA-30076：提取源的提取字段无效

此问题已在本论坛中讨论过（月份除外，它不是我的代码，最初由https://stackoverflow.com/users/3651607/Andy-korneyev发布）。

Answer 1

使用MONTHS_BETWEEN(date1, date2)计算Oracle中的月差异。