INT3027 Web Database Design and Implementation Tutorial 1 Case Study Temporary Employment Corporation (TEC) places temporary workers in companies during peak periods. TEC's manager gives you the following description of the business: • • • • • • TEC has a list of companies that request workers. Specifically, the list contains company codes and company names. Each time a company requests an employee, TEC makes an entry in the Opening folder. This folder contains an opening number, company code, starting date, ending date, hourly pay and qualification code. Each opening requires only one specific qualification. TEC has a file of candidates who are willing to work. The file contains candidate numbers and candidate names. Each candidate may have earned several qualifications in some particular years. Each qualification may be earned by more than one candidate. (For example, it is possible for more than one candidate to earn a BEd degree in 2018 OR a PGDE degree in 2019. And clearly it is also possible that a candidate may have earned both a BEd in 2018 and a PGDE in 2019) When a candidate matches the qualification of an opening, (s)he may be given the job, and an entry is made in the Placement Record folder. This folder contains a placement number, placement starting date, opening number, candidate number, and total hours worked. TEC uses special codes to describe a candidate's qualifications for an opening. Below is a sample list of codes: CODE CLERK PRG-JAVA PRG-C++ DBA-SQL SYS-1 SYS-2 DESCRIPTION General clerking work Programmer, Java Programmer, C++ Database Administrator, SQL Server Systems Analyst, level 1 Systems Analyst, level 2 TEC's management wants to keep track of the following entities: l l l l l COMPANY OPENING QUALIFICATION CANDIDATE PLACEMENT Given this information, identify all possible relationships and draw the Crow’s Foot E-R diagram for this enterprise. You should also resolve all M:N relationships in the diagram. Upload the completed ER diagram to Moodle and write down all group member names on the diagram.
