Question

please attempt if your 100% sure about the answer, also draw a proper diagram

ASSESSMENT OUTLINE During peak perlods, Temporary Employment Corporation (TEC) places temporary workers in companies. TEC's manager gives you the following description of the business: • TEC has a file of candidates who are willing to work. • If the candidate has worked before, that candidate has a specific job history. (Naturally, no Job history exists if the candidate has never worked.) Each time the candidate works, one additional Job history record is created. • Each candidate has earned several qualifications. Each qualification may be earned by more than one candidate. (For example, it is possible for more than one candidate to have earned a Bachelor of Business Administration degree or a Microsoft Network Certification. And clearly, a candidate may have earned both a BBA and a Microsoft Network Certification) • TEC offers courses to help candidates Improve their qualifications. • Every course develops one specific qualification; however, TEC does not offer a course for every qualification. Some qualifications have multiple courses that develop that qualification. • Some courses cover advanced topics that require specific qualifications as prerequisites. Some courses cover basic topics that do not require any prerequisite qualifications. A course can have several prerequisites. A qualification can be a prerequisite for more than one course. • Courses are taught during training sessions. A training session is the presentation of a single course. Over time, TEC will offer many training sessions for each course; however, new courses may not have any training sessions scheduled right away. • Candidates can pay a fee to attend a training session. A training session can accommodate several candidates, although new training sessions will not have any candidates registered at first. • TEC also has a list of companies that request temporaries. • Each time a company requests a temporary employee, TEC makes an entry in the Openings folder. That folder contains an opening number, a company name, required qualifications, a starting date, an anticipated ending date, and hourly pay. • Each opening requires only one specific or main qualification . When a candidate matches the qualification, the job is assigned, and an entry is made in the Placement Record folder. That folder contains an opening number, a candidate number and total hours worked. In addition, an entry is made in the job history for the candidate. • An opening can be filled by many candidates, and a candidate can fill many openings. • TEC uses special codes to describe a candidate's qualifications for an opening. The list of codes is shown in Table 1.

Answer 1

Crows Foot ERD diagram

company candidate_no candidate_qualifich name address lists * Openning job_open_no company name start,end date hr pay EE Qualification candidate matches candidate_no has 1 has candidate_qualific candidateno candidate_code candidatecouresno phone_number address History candidate_no candidate_tothours creates places course candidate no placement candidate no job open no total hours worked course no training session number name course no training session fee

Relationships

Primary key Candidate number is the primary key in company table, opening table, qualification table, candidate table, history table, course table, placement table and session tables. Foreign key • candidate number • candidate qualification • candidate job • candidate code • candidate course number Relationship between tables • For company to candidate table, the relationship exists as one to many • For history to candidate table, the relationship exist as one to many • For qualification to candidate table the relationship exists as one to many • For qualification to opening table the relationship exists as one to many • For qualification to history table the relationship exists as one to one • For history to placement table the relationship exists as one to many • For qualification to course table the relationship exists as one to many • For course to session table the relationship exists as one to many