## Software_Developers

id | name | experience | skills | grade
--- | --- | --- | --- | ---
1 | John Doe | 3 | Python, Java, C++ | Middle
2 | Jane Smith | 6 | JavaScript, PHP, Ruby | High

## Data_Analysts

id | name | experience | tools | grade
--- | --- | --- | --- | ---
1 | Alice Johnson | 4 | Excel, Tableau, R | Middle
2 | Bob Brown | 7 | SQL, SAS, Python | Advanced

## Companies

id | name | location | size
--- | --- | --- | ---
1 | TechCorp | New York | Large
2 | Startup Inc. | San Francisco | Small

## Projects

id | description | startDate | endDate | companyId
--- | --- | --- | --- | ---
|  |  |  | (→ Companies.id)
1 | Web Application Development | 2021-08-01 | 2021-12-31 | 1
2 | Mobile App Design | 2021-09-01 | 2021-12-31 | 2

## Developers_Projects

developerId | projectId
--- | ---
(→ Software_Developers.id) | (→ Projects.id)
1 | 1
2 | 2

## Analysts_Projects

analystId | projectId
--- | ---
(→ Data_Analysts.id) | (→ Projects.id)
1 | 1
2 | 2