Database design is made up of two main phases called logical and physical design. During logical database design, we identify the important objects that need to be represented in the database and the relationships between these objects. During physical database design, we decide how the logical design is to be physically implemented (as tables) in the target DBMS. Therefore it is necessary to have selected the target DBMS before we are able to proceed to physical database design.
kevowmuchiri answered the question on July 4, 2018 at 16:04
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Discuss what a user view represents when designing a database system.
(Solved)
Discuss what a user view represents when designing a database system.
Date posted:
July 4, 2018
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Answers (1)
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Describe the purpose of creating a mission statement and mission objectives for the required database during the database planning stage.
(Solved)
Describe the purpose of creating a mission statement and mission objectives for the required database during the database planning stage.
Date posted:
July 4, 2018
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Briefly describe the stages of the database system development lifecycle.
(Solved)
Briefly describe the stages of the database system development lifecycle.
Date posted:
July 4, 2018
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Discuss the relationship between the information systems lifecycle and the database system development lifecycle.
(Solved)
Discuss the relationship between the information systems lifecycle and the database system development lifecycle.
Date posted:
July 4, 2018
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Answers (1)
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Describe what is meant by the term ‘software crisis’.
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Describe what is meant by the term ‘software crisis’.
Date posted:
July 4, 2018
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What is QBE and what is the relationship between QBE and SQL?
(Solved)
What is QBE and what is the relationship between QBE and SQL?
Date posted:
July 4, 2018
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Answers (1)
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What is the difference between a sub query and a join? Under what circumstances would you not be able to use a sub query?
(Solved)
What is the difference between a sub query and a join? Under what circumstances would you not be able to use a sub query?
Date posted:
July 4, 2018
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Answers (1)
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Explain how the GROUP BY clause works. What is the difference between the WHERE and HAVING clauses?
(Solved)
Explain how the GROUP BY clause works. What is the difference between the WHERE and HAVING clauses?
Date posted:
July 4, 2018
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Answers (1)
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What restrictions apply to the use of the aggregate functions within the SELECT statement? How do nulls affect the aggregate functions?
(Solved)
What restrictions apply to the use of the aggregate functions within the SELECT statement? How do nulls affect the aggregate functions?
Date posted:
July 4, 2018
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Answers (1)
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Explain the function of each of the clauses in the SELECT statement. What restrictions are imposed on these clauses?
a)FROM
b) WHERE
c)GROUP BY
d)HAVING
e)SELECT
(Solved)
Explain the function of each of the clauses in the SELECT statement. What restrictions are imposed on these clauses?
a)FROM
b) WHERE
c)GROUP BY
d)HAVING
e)SELECT
Date posted:
July 4, 2018
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Answers (1)
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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
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Answers (1)
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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
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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...
(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
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Answers (1)
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Discuss the properties of a relational table.
(Solved)
Discuss the properties of a relational table.
Date posted:
July 4, 2018
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Discuss the advantages and disadvantages of DBMSs.
(Solved)
Discuss the advantages and disadvantages of DBMSs.
Date posted:
July 4, 2018
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Answers (1)
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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
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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.
(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
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Answers (1)
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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
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Answers (1)
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Describe the main characteristics of the database approach.
(Solved)
Describe the main characteristics of the database approach.
Date posted:
July 4, 2018
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Answers (1)
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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
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Answers (1)