Concept explainers
Normalization:
The process used to minimize data redundancy and dependency in a relational
Third normal form (3NF):
- The value of any non-primary key attributes will not depend on any other non-primary key attributes.
- If any non-primary key attributes depend on any other non-primary key attribute then it should be moved or deleted.
- It is termed as transitive dependency.
Partial dependency:
A partial dependency exists at that time of an attributes depends only a part of primary key. This dependency is related with 1st normal form.
Transitive dependency:
A transitive dependency exists at that time of an attributes depends on another attribute which is not part of primary key.
Functional dependency:
An association between two attributes or two set of attributes in a same relational database table, which is having some constraints is known as functional dependency.
- In a table one attribute is functionally dependent on another attribute to take one value.
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Chapter 6 Solutions
Database Systems: Design, Implementation, & Management
- Using the descriptions of the attributes given in the figure, convert the ERD shown in Figuregiven below into a dependency diagram that is in at least 3NF. Draw diagram for every levelgoing from 1NF to 2NF to 3NF.arrow_forwardDeepClean StaffID ContractNo HoursPerWeek StaffName OfficeNo OfficeLocation 101 C90 16 Anne O25 Ampang 102 C90 24 Rita O25 Ampang 103 C91 28 Mandy O7 Kg Baru 101 C91 16 Anne O7 Kg Baru Draw the dependency diagram and label the primary key(s), partial dependency(s) and transitive dependency. Based on the dependency diagram in Question (a), show the Second Normal Form (2NF) relations. Convert the relations to the Third Normal Form (3NF).arrow_forwardPlease provide the dependency diagram for this ERD You can find an example of dependency below: the ERD Digram is below So we want to provide the dependency diagarmarrow_forward
- Draw a dependency diagram to show the partial and transitive dependencies in this data.arrow_forwardDraw the dependency diagram and identify the functional dependencies. Show the process of converting this table to 3NFarrow_forwarda) Draw a 1NF dependency diagram. Based on the data in table above, identify all the functional dependencies, partial dependencies and transitive dependencies in order for the table to be in the first normal form (1NF).arrow_forward
- create a dependency diagram based on this ERD. Decompose the relation in the resulting dependency diagram into a set of 3NF relation this is introduction to databse system questionarrow_forwardIllustrate, list and label all the functional dependencies diagram contained in this table. Is there any transitive dependency exist? Justify your answer.arrow_forwardState the related Primary Key in this table? Illustrate, list and label all the functional dependencies diagram contained in this table. Is there any transitive dependency exist? Justify your answer.arrow_forward
- The dependency diagram in Figure Q6.8 indicates that a patient can receive many prescriptions for one or more medicines over time. Based on the dependency diagram, create a database whose tables are in at least 2NF, showing the dependency diagram for each table.FIGURE Q6.8 PRESCRIPTION DEPENDENCY DIAGRAMarrow_forwardQUESTION 1 The dependency diagram in figure below indicates that authors are paid royalties for each book that they write for a publisher. The amount of the royalty can vary by author, by book, and by edition of the book. Book royalty dependency diagram See attached for diagram Based on the dependency diagram, create a database whose tables are at least in 2NF, showing the dependency diagram for each table Create a database whose tables are at least in 3NF, showing the dependency diagram for each table.arrow_forwardQ. Create a dependency diagram that is in second normal form Note: Correct and detailed answer will be Upvoted else downvoted. No plagarism please!arrow_forward
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