ORMs(对象关系映射)在数据库世界中是如何建立的

I'm not a database admin or architect, so I have to ask those who do it 24/7. How established is the concept of an ORM (object relational mapping) in the world of database administration and architecture? Is it still happening, widely approved but still in its early stages, or is generally disapproved? I'm learning this area and would like to get a feel for whether it's going to be knowledge appreciated by the wider segment of this field.I'm not a database admin or architect, so I hav