Using MIS 2e Chapter 5 Database Processing MARIA DEL MORAL GROUP F

Q4 – How do database applications make databases more useful?  A database application includes forms, reports, queries, and applications programs available to one or more users. Fig 5-10 Use of Multiple Database Applications

Q4 – How do database applications make databases more useful?  Data entry forms are used to read, insert, modify, & delete data.  Reports are used to show data in a structured context as the example to the right shows. Fig 5-11 Example of a Student Report

Q4 – How do database applications make databases more useful?  A query form helps the user quickly find answers to questions. In this case, the words “barriers to entry” were found in Baker’s record.

Q4 – How do database applications make databases more useful?  Database application programs process logic specific to a given business need. For example, a program could track backordered items and hold a customer order until the items are ready to ship.  Application programs enable database processing over the Internet as the figure below shows. Users access the applications programs on a Web server, which in turn accesses a single DBMS and database. Fig 5-13 Four Application Programs on a Web Server Computer

Q 4 – How do database applications make databases more useful?  This figure depicts multi-user database processing. The system must be managed properly to avoid the following problems: Potential update loss because two users update same data at the same time Potential locking problems Possible data conflicts

Q4 – How do database applications make databases more useful?  Here’s a comparison of an Enterprise DBMS versus a Personal DBMS.  Enterprise DBMS Large organizational and workgroup databases Thousands of users Many different database applications 24/7 operations DB2, SQL Server, Oracle  Personal DBMS Smaller, simpler applications Personal or small workgroup applications Fewer than 100 users Microsoft Access is both a DBMS and application development product as this figure depicts. Fig 5-14 Personal Database System