| candidate_id | skill |
| ------------ | ------------ |
| 123 | Python |
| 234 | R |
| 123 | Tableau |
| 123 | PostgreSQL |
| 234 | PowerBI |
| 234 | SQL Server |
| 147 | Python |
| 147 | Tableau |
| 147 | Java |
| 147 | PostgreSQL |
| 256 | Tableau |
| 102 | DataAnalysis |