What is the difference between DAO and DAL?
2016-01-04 15:01
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What is the difference between DAO and DAL?
The Data Access Layer (DAL) is the layer of a system that exists between the business logic layer and the persistence / storage layer.
A DAL might be a single class, or it might be composed of multiple Data Access Objects (DAOs).
It may have a facade over the top for the business layer to talk to, hiding the complexity of the data access logic.
It might be a third-party object-relational mapping tool (ORM) such as Hibernate.
DAL is an architectural term, DAOs are a design detail.
The Data Access Layer (DAL) is the layer of a system that exists between the business logic layer and the persistence / storage layer.
A DAL might be a single class, or it might be composed of multiple Data Access Objects (DAOs).
It may have a facade over the top for the business layer to talk to, hiding the complexity of the data access logic.
It might be a third-party object-relational mapping tool (ORM) such as Hibernate.
DAL is an architectural term, DAOs are a design detail.
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