Companies
| id | name |
| 1 | Company A |
| 2 | Company B |
| 3 | Company C |
| 4 | Company D |
| 5 | Company E |
Technologies
| id | career_title |
| 1 | Software Developer |
| 2 | Data Analyst |
| 3 | Product Manager |
| 4 | UX Designer |
| 5 | QA Engineer |
Grades
| id | grade |
| 1 | Junior |
| 2 | Middle |
| 3 | Senior |
| 4 | Lead |
| 5 | Principal |
Skills
| id | skill_name |
| 1 | Python |
| 2 | JavaScript |
| 3 | SQL |
| 4 | React |
| 5 | Angular |
JobPostings
| id | title | company_id | technology_id | grade_id |
| | (→ Companies.id) | (→ Technologies.id) | (→ Grades.id) |
| 1 | Software Developer | 1 | 1 | 2 |
| 2 | Software Developer | 2 | 3 | 1 |
| 3 | Data Analyst | 3 | 4 | 3 |
| 4 | Data Analyst | 4 | 5 | 2 |
| 5 | Product Manager | 1 | 6 | 4 |
| 6 | UX Designer | 2 | 7 | 1 |
| 7 | QA Engineer | 3 | 8 | 3 |
RequiredSkills
| jobposting_id | skill_id |
| (→ JobPostings.id) | (→ Skills.id) |
| 1 | 1 |
| 1 | 2 |
| 2 | 3 |
| 2 | 4 |
| 3 | 5 |
| 3 | 6 |
| 4 | 7 |
| 4 | 8 |
| 5 | 9 |
| 5 | 10 |