case 11 job portal

7/23/2019 Case 11 Job Portal

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CASE STUDY

Objective:On doing this case study the associates will be able todo the conceptual and logical design of a given database

specication. They will be also able to create tables without

anomalies.

Prerequisite:The knowledge of E-R diagram, The mapping of E-R diagram to tables, and the ormali!ation of tables.

SKILLS Concepts: E-R diagram, "apping of E-R diagram to

tables, and the ormali!ation process up to #$.

Duration: % hrs

Scenario setup: &n this case-study you have to prepare a databasedesign for an online 'ob portal. This system will be available on the internetfor access to all people. (sing this website, employers will be able to posttheir 'ob openings and the 'ob seekers can provide their information on thesite so that the system will intimate the 'ob seekers the 'obs for which theyare eligible to apply. To make use of this system the employers and the 'obseekers have to register themselves with the site.)uring the registration the system provides a uni*ue &d to both employers

and 'ob seekers. )uring the registration both the employers and the 'ob

seekers have to provide the following details + ame, ddress, e-mail

address, hone number, (ser name, assword, whether the person who

registers is an employer or the 'ob seeker. )uring the registration the

employer must provide all the details of hisher company as well as 'ob

details. The company/s details include name of the company, address, hone

number, and yearly turn over, level of the company, and the number of

employees.

$or the companies whose ""0 level is below %, the owners themselves

should register as employers. ssume that one employer owns only one

company located at a single place. Once all the 'obs o1ered by a company

got lled up, the company/s details together with the 'ob details and the

corresponding employer/s details also gets deleted from the database.


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The details of ""0 % level companies located at all over the world are

already maintained in the database. Once an opening arises in any one of

these companies at any location, a corresponding employer representing the

company has to register in the site together with the 'ob details, but heshe

does not have to give the company/s details2e3cept the name and the

location4 since those details already e3ist in the database. ssume that one

employer can register for a company located at one location. &f any opening

arises for the sane company at another location some other employer should

register for that. Once all the openings of a company corresponding to an

employer are lled up, the employer/s details and the 'ob details will be

deleted from the database.

The 'ob seekers must also provide the following details during registration +

)ate of 5irth, 6ighest 7ualication, 8kills the 'ob seeker possesses and the

e3perience in months for each of hisher skill. The registered employer can

post hisher 'ob opening with the following details + 9ob Title, 9ob description,

yearly package, skills re*uired for the 'ob, minimum number of years of

e3perience for each re*uired skill, total e3perience re*uired2in months4,

number of vacancies, the company in which the openings e3ist, and the

contact person/s name and phone number, and the date and place of

interview. The system searches the appropriate 'obs for each 'ob seeker and

sends the 'ob details through e-mail.

Deliverables:

2:4 neat E-R diagram that shows the entities 2together

with attributes4, relationship among the entities and the

cardinalities of the relationships.2;4 ormali!ed Tables

Coon ista!es:

One possible E-R diagram+


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"ob Portal

(ser


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Co

2:48hould there be subtypes of 0ompany called ""0% and =ow-level

companies ?

This subtyping is not needed since these two subtypes neither have any

specic attributes attached to it nor have any specic relationship with any

other entity.

2;4&s the following variation in the E-R diagram is correct for the given

conte3t ?

lace


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>es this is also a correct design. The reason is because of the following

business rule+ &f the company is below ""0 level %, we assume that the

owner is the employer and the heshe owns only one company. &f the

company is ""0 level%, we assume that only one employer can represent a

company located at one location.

2#4 8hould we make subtypes of Employer as owner and represented

since they havedi1erent relationships with company entity?

This sub typing is irrelevant for the given conte3t since owns or

represents does not make any di1erence in the given conte3t.

#E$E#E%CES

Represents

0ompany

Owns

RepresenterOwner

d

Employer

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