
168 ◾ Cloud Database Development and Management
5.3 Data-Tier Application
During the application development process, typically, two servers are used: one is used for sup-
porting production and one is used for application development. Since the environments in the
production server and development server are not exactly the same, some of the database objects
and programming scripts that work perfectly on one server may not work on the other server.
Databases and their applications are very dynamic. ey are often upgraded and modified. e
changes made to a database on one server may not work for the database on the other server. To
support dat ...