The most important reason to use an ORM is so that you can have a rich, object oriented business model and still be able to store it and write effective queries quickly against a relational database.

Should I use ORM or not?

While ORMs can make building complex queries confusing to build and difficult to debug, an ORM can save you huge amounts of time if your queries are generally pretty simple. ... If it absolutely, positively, has to, has to, has to go fast, you may not want to use ORM.

Should I use SQL or ORM?

ORM and SQL are two tools available that web developers can use in database management. When comparing them, SQL has a higher hands-on management than ORM. Because ORM has a higher level of abstraction and more complexity than SQL, less hands-on management is required; this makes data management more efficient.