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
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This question was answered on: Oct 07, 2020
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STATUSAnswered
QUALITYApproved
DATE ANSWEREDOct 07, 2020
EXPERTTutor
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