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A data definition language (DDL) for defining the database structure.
A data manipulation language (DML) for retrieving and updating data.
kevowmuchiri answered the question on July 4, 2018 at 15:37
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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)
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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)
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Discuss the properties of a relational table.
Date posted: July 4, 2018. Answers (1)
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Discuss the advantages and disadvantages of DBMSs.
Date posted: July 4, 2018. Answers (1)
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Describe the functions that should be provided by a modern full-scale multi-user DBMS.
Date posted: July 4, 2018. Answers (1)
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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)
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Date posted: July 4, 2018. Answers (1)
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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)
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Outline four types of memory as used in data structures.
Date posted: July 3, 2018. Answers (1)
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Define Data structures.
Date posted: July 3, 2018. Answers (1)
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Explain the difference between nominal and real gross domestic product (GDP).
Date posted: July 3, 2018. Answers (1)
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Explain how an interactive DVD can be used to train users of an information system
Date posted: July 3, 2018. Answers (1)
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Date posted: July 3, 2018. Answers (1)
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Date posted: July 3, 2018. Answers (1)
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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)
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(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)
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Describe the role of the programmer during software development.
Date posted: July 3, 2018. Answers (1)
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Explain the main difference between evolutionary prototyping and throw-away prototyping.
Date posted: July 3, 2018. Answers (1)
- An organisation requires a new information system. A feasibility study is carried out. Explain what is meant by
Legal feasibility
Social feasibility(Solved)
An organisation requires a new information system. A feasibility study is carried out. Explain what is meant by
Legal feasibility
Social feasibility
Date posted: July 3, 2018. Answers (1)