System-level security allows for restricting access to the web services from unauthorized clients. It is done in a declarative fashion, whereas application-level security is more flexible. With system-level security, you will most likely have the list of authorized clients’ IP addresses that you will let access your web service through the use of some configuration-management [...]

A trigger is a special type of stored procedure that executes when a specified DML operation (an INSERT, DELETE, or UPDATE, or any combination thereof) occurs. They’re typically used to ensure that business rules are followed or to do other work when a data modification occurs. A trigger is the SQL equivalent of a 3GL [...]

Advantages
The following are the key advantages of wireless Internet (thin client) architecture:

Minimal to zero software deployment. This allows applications to be deployed without any additional client-side configuration. Updates to these applications are also straightforward since only the server has to be updated.
Extends Internet computing model. Many corporate applications are based on the Internet model. Wireless [...]