Updating flat text database files in perl

Posted by / 26-Dec-2017 23:32

Updating flat text database files in perl

This gives you a clean separation between your business objects and the data access logic used to populate those business objects.Presented with the same challenge of making the switch from Oracle to SQL Server, you can just make a copy of the Oracle DAL and then convert it to work with SQL Server.The article discusses the concepts behind the DAL, and the associated PDF file takes a look at a full-blown DAL implementation.

In the meantime, however, you have to continue supporting whatever business logic changes come up.Layered application designs are extremely popular because they increase application performance, scalability, flexibility, code reuse, and have a myriad of other benefits that I could rattle off if I had all of the architectural buzzwords memorized.In the classic three tier design, applications break down into three major areas of functionality: Inside each of these tiers there may also exist a series of sub-layers that provide an even more granular break up the functional areas of the application.So it’s always a good idea to make sure you have a good grasp on the fundamentals.In this article you will explore a key component of application architecture known as the Data Access Layer (DAL), which helps separate data-access logic from your business objects.

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