Online Programz

This tutorial guides you through the creation of an InterBase database application with which you can view and update a sample employee database. You will use the Delphi IDE to create the database application. This tutorial assumes you are familiar with Linux and have read the introduction to Kylix programming and the IDE in the Quick Start Note
This tutorial is written for the Kylix Enterprise and Professional editions, which include the database components. You must have InterBase installed to successfully complete this tutorial. Overview of database architecture The architecture of adatabase application may seem complicated at first, but the use of multiple components simplifies the development and maintenance of actual database applications Database applications include three main parts: the user interface, a set of data access components, and the database itself. In this tutorial, you will create a dbExpress database application. Other database applications have a similar architecture. The user interface includes data-aware controls such as a grid so that users can edit and post data to the database. Thedata access components include the data source, the client dataset, the data provider, a unidirectional dataset, and a connection component. The data source acts as a conduit between the user interface and a client dataset. The client dataset is the heart of the application because it contains a set of records from the underlying database which are buffered in memory. The provider transfers the data between the client dataset and the unidirectional dataset, which fetches data directly from the database.