Comparison With Traditional Data Access Techniques
Compared to traditional techniques of exchange between an object-oriented language and a relational database, ORM often reduces the amount of code that needs to be written.
Disadvantages of O/R mapping tools generally stem from the high level of abstraction obscuring what is actually happening under the hood.
In addition, heavy reliance on ORM software has been pointed to as a major factor in producing poorly designed databases.
Read more about this topic: Object-relational Mapping
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