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CS614 Assignment No. 2 Solution and Discussion Due Date 08-12-2014

Assignment # 2 (GRADED)
Total marks = 20
Deadline Date: 08-12-2014

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Assignment comprises of 20 Marks. Note that no assignment will be accepted after due date via email in any case (whether it is the case of load shedding or emergency electric failure or internet malfunctioning etc.). Hence, refrain from uploading assignment in the last hour of the deadline, and try to upload Solutions at least 02 days before the deadline to avoid inconvenience later on.

For any query please contact: CS614@vu.edu.pk

Question No. 1 [10]
You are given ERD as shown below. Perform appropriate de-normalization technique to any of the one-to-one and one-to-many relations.

Question No. 2 [10]
Consider the below given tables:
Student_ Info

Suppose we need to run the below given query more frequently. But the problem is that the given query links two tables which degrade performance. Perform the most appropriate de-normalization technique to enhance the performance so that we don’t need to perform join.

Select S.Roll_No, S.Name, A.Application_ID,A.Program,A. Application_date from Student_Info S, Application_Info A where A.Roll_No= S.Roll_No

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Replies to This Discussion

Question No 2

Consider the below given tables:

Student_ Info

Roll_No

 

Name

father_Name

 

qualification

Address

MBA_1000

Umair

Ikram

MBA

 

Islamabad

MBA_1001

Wasim

Maqsood

MBA

 

Mardan

MSC_1002

faizan

jawad

MSC

 

211

BS_1003

Atif

Sohail

BS

 

212

 

Application_Info

Appliction_ID

 

Roll_No

Program

 

Application_date

1000

MBA_1000

Master

01/01/2015

 

1001

MBA_1001

Master

01/01/2015

 

1002

MSC_1001

Master

01/01/2015

 

1003

BS_1001

Bachelor

01/01/2015

 

 

 

 

 

 

Select S.Roll_No, S.Name, A.Application_ID,A.Program,A. Application_date from Student_Info S, Application_Info A where A.Roll_No= S.Roll_No

 

Answer:

ApplictionID

 

Roll_No

 

Name

father_Name

 

qualification

Address

Program

 

Application_date

1000

MBA100

Umair

Ikram

MBA

 

Islamabad

Master

01/01/2015

 

1001

MBA101

Wasim

Maqsood

MBA

 

Mardan

Master

01/01/2015

 

1002

MSC102

faizan

jawad

MSC

 

211

Master

01/01/2015

 

1003

BS1003

Atif

Sohail

BS

 

212

Bachelor

01/01/2015

 

 

 

Thanks a lot!!!! But where is the first question? Please also post the answer of first question. I shall be very thankful to you for your at of kindness.

is it correct, any one knows?

bhai yah nai hay yah just tabling hay ap nay qury ka result be show karwana hay :P

Database say jab data read katy hay to us ki report genrate hoti hay i think wo report show karwani hay 

table galat hy.......

2nd question main koi btaye ga is line ka kya matlb hai

Select S.Roll_No, S.Name, A.Application_ID,A.Program,A. Application_date from Student_Info S, Application_Info A where A.Roll_No= S.Roll_No

this is a sql query which perform joining of student info and application info tables...

first question ka bahi kuch bta do kuch samjh nahi a rhai....katny table bnay gay

Select S.Roll_No, S.Name, A.Application_ID,A.Program,A. Application_date from Student_Info S, Application_Info A where A.Roll_No= S.Roll_No

is ka matlab hay 

Table arrangement 

1)Roll #

2)Name  

4)Application_ID

5)Program

6)Application_date 

just yah he column bany gay bus ...

baqi nai ay gay Q kay qurry may nai hay so hum b show nai karway gay .....

bhai Q-1 ka b kuch bata do kitny tables banay gay ??:

any one tell about cs 614

Where is 3 option???

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