Get premium membership and access questions with answers, video lessons as well as revision papers.
(1) Describing the transaction
Using the first approach, you check that all the information (entities, relationships, and their attributes) required by each transaction is provided by the model, by documenting a description of each transaction’s requirements.
(2) Using transaction pathways
The second approach to validating the data model against the required transactions involves representing the pathway taken by each transaction directly on the ER diagram. Clearly, the more transactions that exist, the more complex this diagram would become, so for readability you may need several such diagrams to cover all the transactions.
kalvinspartan answered the question on July 9, 2018 at 19:19
- Discuss an approach to checking a data model for redundancy. Give an example to illustrate your answer.(Solved)
Discuss an approach to checking a data model for redundancy. Give an example to illustrate your answer.
Date posted: July 9, 2018. Answers (1)
- Discuss an approach to identifying attributes from a users’ requirements specification and the association of attributes with entities or relationships.(Solved)
Discuss an approach to identifying attributes from a users’ requirements specification and the association of attributes with entities or relationships.
Date posted: July 9, 2018. Answers (1)
- Discuss an approach to identifying entities and relationships from a users’ requirements specification.(Solved)
Discuss an approach to identifying entities and relationships from a users’ requirements specification.
Date posted: July 9, 2018. Answers (1)
- Identify the main tasks associated with Step 1 of logical database design.(Solved)
Identify the main tasks associated with Step 1 of logical database design.
Date posted: July 9, 2018. Answers (1)
- Discuss the purpose of Step 1 of logical database design.(Solved)
Discuss the purpose of Step 1 of logical database design.
Date posted: July 9, 2018. Answers (1)
- Discuss the main activities associated with each step of the logical database design methodology(Solved)
Discuss the main activities associated with each step of the logical database design methodology
Date posted: July 9, 2018. Answers (1)
- Discuss the important role played by users in the process of database design.(Solved)
Discuss the important role played by users in the process of database design.
Date posted: July 9, 2018. Answers (1)
- Identify important factors in the success of database design.(Solved)
Identify important factors in the success of database design.
Date posted: July 9, 2018. Answers (1)
- Describe the main phases involved in database design.(Solved)
Describe the main phases involved in database design.
Date posted: July 9, 2018. Answers (1)
- Describe the purpose of a design methodology.(Solved)
Describe the purpose of a design methodology.
Date posted: July 9, 2018. Answers (1)
- Describe what is meant by transitive dependency and describe how this type of dependency relates to 3NF. Provide an example to illustrate your answer.(Solved)
Describe what is meant by transitive dependency and describe how this type of dependency relates to 3NF. Provide an example to illustrate your answer.
Date posted: July 9, 2018. Answers (1)
- Describe the characteristics of a table in third normal form (3NF).(Solved)
Describe the characteristics of a table in third normal form (3NF).
Date posted: July 9, 2018. Answers (1)
- Describe what is meant by full functional dependency and describe how this type of dependency relates to 2NF. Provide an example to illustrate your answer.(Solved)
Describe what is meant by full functional dependency and describe how this type of dependency relates to 2NF. Provide an example to illustrate your answer.
Date posted: July 9, 2018. Answers (1)
- Describe the characteristics of a table in second normal form (2NF).(Solved)
Describe the characteristics of a table in second normal form (2NF).
Date posted: July 9, 2018. Answers (1)
- Describe an approach to converting a first normal form (1NF) table to second normal form (2NF) table(s).(Solved)
Describe an approach to converting a first normal form (1NF) table to second normal form (2NF) table(s).
Date posted: July 9, 2018. Answers (1)
- What is the minimal normal form that a relation must satisfy? Provide a definition for this normal form.(Solved)
What is the minimal normal form that a relation must satisfy? Provide a definition for this normal form.
Date posted: July 9, 2018. Answers (1)
- Describe the characteristics of a table that violates first normal form (1NF) and then describe how such a table is converted to 1NF.(Solved)
Describe the characteristics of a table that violates first normal form (1NF) and then describe how such a table is converted to 1NF.
Date posted: July 9, 2018. Answers (1)
- Describe the types of update anomalies that may occur on a table that has redundant data.(Solved)
Describe the types of update anomalies that may occur on a table that has redundant data.
Date posted: July 9, 2018. Answers (1)
- Discuss how normalization may be used in database design.(Solved)
Discuss how normalization may be used in database design.
Date posted: July 9, 2018. Answers (1)
- Describe how strong and weak entities differ and provide an example of each.(Solved)
Describe how strong and weak entities differ and provide an example of each.
Date posted: July 7, 2018. Answers (1)