Identify and discuss the serious data redundancy problems exhibited by the file structure shown in Figure P1.7.

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p/s : the first column first row (highlighted) is 1

a) Identify and discuss the serious data redundancy problems exhibited by the file structure shown in Figure P1.7.

 b) How many different data sources are likely to be used by the file you          examined in problem a?

c) Given your findings in Problems a and b, how would a relational database environment help eliminate the data redundancy problems?

d) Given your answer to Problem c, how many tables would you use to substantially eliminate the data redundancy problems? What table structures would you recommend?

e) Given your answers to problem d, show the table contents for each table.

f) Identify the types of relationships (1:1, 1:M, or M:N) between the tables you defined in problems d and e.

g) Create a relational schema for Problem f.

 

2. Given the file structure shown in Figure P1.7, answer Problems a through g.
Figure P1.7 The File Structure for Problems a-g.
PROJ NUM PROJ_NAME EMP NUM
EMP NAME
JOB CODE JOB_CHG_HOUR PROJ HOURS EMP PHONE
1 Hurricane
101 John D. Newson
EE
$85.00
13.3 653-234-3245
1 Hurricane
105 David F.Schwann CT
$60.00
16.2 653-234-1123
1 Hurricane
110 Anne R. Ramoras
CT
$60.00
$85.00
14.3 615-233-5568
2 Coast
101 John D. Newson
EE
19.8 653-234-3254
2 Coast
108 June H. Sattlemeir
EE
$85.00
17.5 905-554-7812
11.6 615-233-5568
3 Satellite
110 Anne R. Ramoras
CT
$62.00
3 Satellite
105 David F. Schwann CT
$26.00
23.4 653-234-1123
3 Satelite
19.1 615-233-5432
20.7 615-678-6879
123 Mary D. Chen
EE
$85.00
3 Satellite
112 Allecia R. Smith
BE
$85.00
Transcribed Image Text:2. Given the file structure shown in Figure P1.7, answer Problems a through g. Figure P1.7 The File Structure for Problems a-g. PROJ NUM PROJ_NAME EMP NUM EMP NAME JOB CODE JOB_CHG_HOUR PROJ HOURS EMP PHONE 1 Hurricane 101 John D. Newson EE $85.00 13.3 653-234-3245 1 Hurricane 105 David F.Schwann CT $60.00 16.2 653-234-1123 1 Hurricane 110 Anne R. Ramoras CT $60.00 $85.00 14.3 615-233-5568 2 Coast 101 John D. Newson EE 19.8 653-234-3254 2 Coast 108 June H. Sattlemeir EE $85.00 17.5 905-554-7812 11.6 615-233-5568 3 Satellite 110 Anne R. Ramoras CT $62.00 3 Satellite 105 David F. Schwann CT $26.00 23.4 653-234-1123 3 Satelite 19.1 615-233-5432 20.7 615-678-6879 123 Mary D. Chen EE $85.00 3 Satellite 112 Allecia R. Smith BE $85.00
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