Dependency Diagram
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Dependency Diagram

EMP_CODE

EMP_LNAME

DEPT_CODE

JOB_CLASS

EMP_DOB

EMP_HIRE_DATE

DEPT_CODE

DEPT_NAME

EMP_CODE

EMP_CODE

EDUC_CODE

ED_DATE_EARNED

EMP_CODE

DEP_NUM

DEP_FNAME

DEP_TYPE

JOB_CLASS

JOB_TITLE

JOB_BASE_SALARY

EDUC_CODE

EDUC_DESCRIPTION

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publish time: 2021-07-30
Viro

It should be noted here that in the dependency diagram, the primary vital components are bold, underlined, and shaded in a different color. The arrows for the below entities indicate all desirable dependencies, i.e., dependencies based on PK. The arrows below the dependency diagram indicate less desirable dependencies: partial and transitive dependencies. As the below diagram suggests, Dependency Diagrams have no way to indicate multi-valued attributes, nor do they provide the means through which such attributes can be handled. Once again, a basic knowledge of modeling concepts indicates that normalization and design are part of the same process. As shown below, Education, Dependents, and Training are multi-valued attributes whose values are stored as strings.

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