Get premium membership and access questions with answers, video lessons as well as revision papers.
FROM specifies the table or tables to be used;
WHERE filters the rows subject to some condition;
GROUP BY forms groups of rows with the same column value;
HAVING filters the groups subject to some condition;
SELECT specifies which columns are to appear in the output;
kevowmuchiri answered the question on July 4, 2018 at 15:40
- What are the two major components of SQL and what function do they serve? (Solved)
What are the two major components of SQL and what function do they serve?
Date posted: July 4, 2018. Answers (1)
- Define the two principal integrity rules for the relational model. Discuss why it is desirable to enforce these rules.(Solved)
Define the two principal integrity rules for the relational model. Discuss why it is desirable to enforce these rules.
Date posted: July 4, 2018. Answers (1)
- Discuss the differences between the candidate keys and the primary key of a table. Explain what is meant by a foreign key. How do foreign...(Solved)
Discuss the differences between the candidate keys and the primary key of a table. Explain what is meant by a foreign key. How do foreign keys of tables relate to candidate keys? Give examples to illustrate your answer.
Date posted: July 4, 2018. Answers (1)
- Discuss the properties of a relational table. (Solved)
Discuss the properties of a relational table.
Date posted: July 4, 2018. Answers (1)
- Discuss the advantages and disadvantages of DBMSs.(Solved)
Discuss the advantages and disadvantages of DBMSs.
Date posted: July 4, 2018. Answers (1)
- Describe the functions that should be provided by a modern full-scale multi-user DBMS.(Solved)
Describe the functions that should be provided by a modern full-scale multi-user DBMS.
Date posted: July 4, 2018. Answers (1)
- Describe the problems with the traditional two-tier client-server architecture and discuss how these problems were overcome with the three-tier client-server architecture.(Solved)
Describe the problems with the traditional two-tier client-server architecture and discuss how these problems were overcome with the three-tier client-server architecture.
Date posted: July 4, 2018. Answers (1)
- Describe the five components of the DBMS environment and discuss how they relate to each other(Solved)
Describe the five components of the DBMS environment and discuss how they relate to each other
Date posted: July 4, 2018. Answers (1)
- Describe the main characteristics of the database approach.(Solved)
Describe the main characteristics of the database approach.
Date posted: July 4, 2018. Answers (1)
- Discuss the meaning of each of the following terms:
(a) Data
(b) database
(c) database management system
(d) application program
(e) data independence
(Solved)
Discuss the meaning of each of the following terms:
(a) Data
(b) database
(c) database management system
(d) application program
(e) data independence
Date posted: July 4, 2018. Answers (1)
- Outline four types of memory as used in data structures(Solved)
Outline four types of memory as used in data structures.
Date posted: July 3, 2018. Answers (1)
- Define Data structures(Solved)
Define Data structures.
Date posted: July 3, 2018. Answers (1)
- Explain the difference between nominal and real gross domestic product (GDP). (Solved)
Explain the difference between nominal and real gross domestic product (GDP).
Date posted: July 3, 2018. Answers (1)
- Explain how an interactive DVD can be used to train users of an information system(Solved)
Explain how an interactive DVD can be used to train users of an information system
Date posted: July 3, 2018. Answers (1)
- An interactive DVD can be used to provide training. Describe how data is written onto a DVD.(Solved)
An interactive DVD can be used to provide training. Describe how data is written onto a DVD.
Date posted: July 3, 2018. Answers (1)
- Explain how auditing software is used on a computer network(Solved)
Explain how auditing software is used on a computer network
Date posted: July 3, 2018. Answers (1)
- Communication standards are required when data is transmitted over a network.
Explain the need for communication standards(Solved)
Communication standards are required when data is transmitted over a network.
Explain the need for communication standards
Date posted: July 3, 2018. Answers (1)
- Most organisations have replaced standalone computers with a network. Identify three advantages of a network over standalone computers.
(Solved)
Most organisations have replaced standalone computers with a network. Identify three advantages of a network over standalone computers.
Date posted: July 3, 2018. Answers (1)
- Describe the role of the programmer during software development.(Solved)
Describe the role of the programmer during software development.
Date posted: July 3, 2018. Answers (1)
- Explain the main difference between evolutionary prototyping and throw-away prototyping.(Solved)
Explain the main difference between evolutionary prototyping and throw-away prototyping.
Date posted: July 3, 2018. Answers (1)