Podcast Beta
Questions and Answers
What is a database system?
What is the primary function of metadata in a database system?
What is an example of a database system?
What is a problem with manual file systems?
Signup and view all the answers
Which of the following is a characteristic of a database system that ensures data reliability?
Signup and view all the answers
What is another problem with manual file systems?
Signup and view all the answers
What is the primary purpose of ACID properties in a database system?
Signup and view all the answers
What is the benefit of insulation between data and program in a database system?
Signup and view all the answers
What is a characteristic of a database system?
Signup and view all the answers
What is a disadvantage of manual file systems?
Signup and view all the answers
What is the primary purpose of transactions in a database system?
Signup and view all the answers
What is a problem with manual file systems in terms of data?
Signup and view all the answers
What is the benefit of providing multiple views of the database to users?
Signup and view all the answers
What is another problem with manual file systems?
Signup and view all the answers
What is the primary purpose of data persistency in a database system?
Signup and view all the answers
What is the primary purpose of security in a database system?
Signup and view all the answers
What is one of the main functions of a DBMS?
Signup and view all the answers
What is one of the advantages of using a DBMS?
Signup and view all the answers
What is a characteristic of a database system?
Signup and view all the answers
What type of DBMS is used by multiple users?
Signup and view all the answers
What is one of the disadvantages of using a DBMS?
Signup and view all the answers
What is the role of a Database Administrator?
Signup and view all the answers
What is one of the functions of a DBMS in protecting the database?
Signup and view all the answers
What is one of the classification of DBMS according to the data model?
Signup and view all the answers
What is one of the functions of a DBMS in manipulating a database?
Signup and view all the answers
What is the role of a System Analyst?
Signup and view all the answers
Study Notes
Database Processing
- DBMS provides a set of functions to manage data, including:
- Insert
- Update
- Delete
- Search/View
Functions of DBMS
- Defining a database:
- Specifying data types, structures, and constraints
- Constructing the database
- Manipulating a database:
- Querying the database to retrieve specific data
- Updating the database to reflect changes
- Generating reports from the data
- Sharing a database:
- Allowing multiple users to access the database
- Protecting the database:
- System protection against hardware or software malfunction
- Security protection against unauthorized or malicious access
- Maintaining the database system:
- Evolving the system as requirements change over time
Database Users
- Database Administrators:
- Administering resources such as database, DBMS, and related software
- Database Designers:
- Identifying data to be stored in the database
- Choosing appropriate structures to represent and store data
- End users:
- Accessing the database for querying, updating, and generating reports
- System Analysts and Application Programmers (Software Engineers):
- Determining the requirements of end users and developing specifications
- Implementing these specifications as programs
Advantages of DBMS
- Controlling redundancy
- Improving data consistency
- Restricting unauthorized access
- Sharing of data
- Providing multiple user interfaces
- Representing complex relationships among data
- Enforcing standards and integrity constraints
- Providing backup and recovery
- Increasing concurrency
Disadvantages of DBMS
- Complexity
- Cost of DBMS
- Additional hardware costs
- Cost of conversion
- Performance
- Higher impact of failures
Classification of DBMS
- According to the data model:
- Relational Model
- Network Model
- Hierarchical Model
- Object Data Model
- Object-relational Model
- According to the number of users:
- Single user Systems
- Multi-user Systems
- According to the distribution:
- Centralized DBMS
- Distributed DBMS
Characteristics of Database System
- Real World Entity:
- Using real-world entities to design databases
- Self-Describing Nature:
- A DBMS should be self-describing, containing the database and metadata
- Support ACID Properties:
- Accuracy, Completeness, Isolation, and Durability
- Concurrent Use of Database:
- Multiple users can access the data at the same time
- Insulation Between Data and Program:
- Changes in data do not affect application software
- Transactions:
- Only completed or uncompleted
- Data Persistency:
- Data is protected from system failure
- Backup and Recovery:
- Enables more effectiveness
- Data integrity:
- Protects unauthorized access and ensures data quality
- Multiple Views:
- Users can have multiple views of the database depending on their department and interest
- Store any kind of data:
- Any kind of data can be stored in DBMS
- Security:
- Provides different rights to access the database
- Represent complex relationships between data:
- Able to represent complex relationships between data for efficient and accurate use
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Learn about the functions of a Database Management System (DBMS) including defining, constructing, and managing a database. Understand the different operations that can be performed on a database.
