Weak iv

ON-LINE DATABASES

 An on-line database is a database accessible from a network,including internet.It differs from a local database,held in an individual computer or its attached storage. 

                          This is a simple screen in a database  ---------->

  

                                     Advance screen in a database ------------------->

                                     Simple screen ----------------------------------->

                                     A view of on-line database ------------------>

Advantages of on-line database

• It means all of the information is together.
• The information can be portable if on a laptop.
• The information is easy to access at any time.
• It's more easily retrievable.
• Many people can access the same database at the same time.
• Improved data security.
• Reduced data entry, storage, and retrieval costs.

Disadvantages of on-line database

• Database systems are complex, difficult, and time-consuming to design.
• Initial training required for all programmers and users.
• Suitable hardware and software start-up costs.
• A longer running time for individual applications.