Database - SQL - Relational Algebra/Expression Trees - ER Diagram


Database for Staffing Portal

The purpose of this project is to design and implement a relational database for an online

staffing portal [OSP]. Generally speaking, customers and clients expect the OSP to:

1. Collect information about available positions

2. Present available opening positions to the job seekers

3. Collect CV’s from candidates

4. Present available CV’s to the employers so they can find an employee that matches

their requirements

Part I:

1. Explore some of the online staffing sites on the Web to collect the basic facts and

requirements. Write down the information and requirements you gathered. Give the

URLs for the sites contacted.

2. Specify a number of essential functional dependencies for each relation. Identify

possible keys, whenever exist, and the primary key and foreign keys for each relation.

3. Draw an appropriate E/R diagram that satisfies requirements collected, indicating

weak and subclass entity sets, whenever exist, and multiplicity of relationships.

4. Translate the E/R diagram to relational database schemas.

5. Examine the database relations for BCNF violations. Decompose the relations that

are not in BCNF into collections of relations that are in BCNF as necessary.

Part II:

In your preliminary analysis in Part I, you have determined the basic facts about the

industry and operations of the OSP. Generate relational algebra [RA] expressions and

expression trees, and SQL code to answer the following queries. Use standard notation and

appropriate RA terminology. You may need to modify the database schema to answer the

queries below.


1. Find all the jobs posted per company in each category per function over a year per

3. Determine the demand for jobs in each category per function and region.


4. Determine the supply of applicants for jobs per company, function and region.


5. Determine the success rate of the OSP in filling the job openings per company,

function, and region.

Part III:

Submit a written report that includes:

1. The complete E/R diagram and schema of the relational database fully specifying the

given requirements and any other requirements gathered. Identify all keys, foreign keys,

functional dependencies of the database relations.

2. SQL code that creates the tables structure.

3. SQL code that loads the data. Data must be representative of fair size.

4. RA expressions, RA expression trees, and SQL code that answer the given queries.

5. Sample outputs for your SQL code.

Habilidades: Administração de Bancos de Dados, Desenvolvimento de Banco de Dados, Programação de Banco de Dados, Oracle, SQL

Veja mais: relational algebra solved examples, example of relational algebra with queries, relational algebra in dbms exercises and solutions, relational algebra query questions and answers, relational algebra tutorial with answers, write the following queries in relational algebra, relational algebra solved exercises, write the following queries in relational algebra, using the university schema., er diagram to relational schema, er diagram sql, convert sql relational algebra, restaurant database sql relational model, create dfd er diagram project, lunches database sql, converting sql 2000 database sql server 2005 express

Acerca do Empregador:
( 0 comentários ) Newark, United States

ID do Projeto: #15820881

Concedido a:

$30 USD em 3 dias
(1 Comentário)

7 freelancers estão ofertando em média $32 para esse trabalho


Hello, am an experienced database design and development expert. Am confident I will deliver. Relevant Skills and Experience Database design, ERD, Normalization Proposed Milestones $25 USD - Database design

$25 USD em 1 dia
(6 Comentários)

I can design and implement your relational database as soon as possible, please contact me further for the same we can complete asap Relevant Skills and Experience > Web Applications using PHP + MySQLi + API + jQuery Mais

$50 USD em 1 dia
(4 Comentários)
$25 USD em 1 dia
(3 Comentários)
$25 USD em 1 dia
(1 Comentário)

Hello, i have read your job description and fully understand your requirements. It looks like I’ll be the perfect candidate for this job because I have hands on experience in this field. Relevant Skills and Experien Mais

$35 USD em 1 dia
(0 Comentários)
$35 USD em 1 dia
(0 Comentários)