Question Details

Answered: - Transform the logical E-R diagram of Figure 1 into a physical E-R


Please see attached file.?

Deliverables:

Complete table 1 in Excel (i.e. complete the cell with question marks).? Use Excel formula to make any calculation and save the worksheet


Transform the logical E-R diagram of Figure 1 into a physical E-R diagram. The sizes of the

 

attributes of each table and the expected initial record counts per table are shown in table 1.

 

Perform a volumetrics analysis for the database. Assume that the DBMS that will be used to

 

implement the system requires 30% overhead to be factored into the estimates. Also, assume a

 

growth rate of 10% for the database per year. The systems development team wants to ensure

 

that adequate data storage is obtained for the next 3 years.

 

Student

 


 

Offering

 


 

StdSSN

 

StdName

 


 

OfferNo

 

OffLocation

 


 

Registers

 


 

Enrollment

 


 

Grants

 


 

EnrGrade

 


 

Figure 1

 


 

Student Enrollment System

 

Volumetrics Analysis

 

Table

 

Name/Attributes

 

Student

 

StdSSN

 

StdName

 


 

Attributes Record Overhead

 

sizes

 

Size

 

Factor

 


 

2,000

 


 

??

 


 

500

 


 

??

 


 

6000

 


 

30%

 


 

??

 


 

??

 


 

6

 

4

 

??

 


 

Enrollment

 

ForeignKey1 ??

 

ForeignKey2 ??

 

EnrGrade

 


 

Initial Table Initial Table

 

Size (records) Volume

 


 

9

 

50

 

??

 


 

Offering

 

OfferNo

 

OfferLocation

 


 

Total

 

Record

 

Size

 


 

30%

 


 

??

 


 

??

 

??

 

3

 

??

 


 

30%

 


 

??

 

Total Initial Volume:

 

Growth Rate per Year:

 

Total Volume in 3 years:

 


 

??

 

10%

 

??

 


 

Table 1

 

Deliverables:

 


 

1. Complete table 1 in Excel (i.e. complete the cell with question marks). Use Excel formula to

 

make any calculation and save the worksheet

 

Grading Rubric:

 


 

1

 


 

Criteria

 

Identification of the foreign keys with their sizes

 

Calculation of record sizes of the tables

 

Calculation of total record sizes of the tables

 

Calculation of initial table volumes

 

Calculation of total initial volume

 

Calculation of total volume in 3 years

 

Total

 


 

Points

 

3.0

 

1.5

 

1.5

 

1.5

 

1.0

 

1.5

 

10

 


 

2

 


 

 


Solution details:

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QUALITY

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DATE ANSWERED

Oct 07, 2020

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