1.1. Define the following terms: data, database, DBMS, database system, database
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Question
1.1. Define the following terms: data, database, DBMS, database system, database catalog, program-data independence, user view, DBA, end user, canned transaction, deductive database system, persistent object, meta-data, and transaction-processing application. 1.3. Discuss the main characteristics of the database approach and how it differs from traditional file systems. 28 Chapter 1 Databases and Database Users 1.5. What are the different types of database end users? Discuss the main activities of each. 1.7. Discuss the differences between database systems and information retrieval systems.Explanation / Answer
Data are values belonging to a particular set or system. Data may be qualitative or quantitative.
A database is a structured collection of data. The data are typically organized to model relevant aspects of reality, in a way that supports processes requiring this information.
A database system consists of a data model, DBMS and database.
A DBMS is a set of programs that enables you to store, modify, and extract information from a database, it also provides users with tools to add, delete, access, modify, and analyze data stored in one location.
How database differs from File Systems
The database is a mutually exclusive data collection, stored in the database server; format of these data is stored in the table. The main purpose of the database is to provide a way to store and retrieve database information quickly and efficiently.
Database approach is to maintain a single repository of data has been defined many users at once, and then accessed by. Database basic approach is characterized by the following data only includes specific data, however, it is a complete definition and description of the database structure and constraints. These definitions are stored in the system catalog.
Other major features of the database is that it allows multiple users to access the database in the same time and data can be shared. Database software to include parallel processing control, but multiple users to ensure the same data and update them at the same time, it must maintain proper control. File system approach to many programmers and file will be created over a long period in various file formats are different from the language used in various applications.
Different types of DB users:
1. naive
2. sophisticated
3. specialised
4. application programmers
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