Demo
Employees
| ename | edepartment | eperiod |
|---|---|---|
| Sam | Management | [2015-01-01,2017-01-01) |
| Ann | Shipment | [2015-06-15,2018-01-01) |
| Joe | Production | [2015-01-01,2018-01-01) |
| Jan | Shipment | [2015-01-01,2017-01-01) |
Managers
| mname | mdepartment | mperiod |
|---|---|---|
| Frank | Production | [2015-01-01,2018-01-01) |
| Frank | Shipment | [2015-01-01,2015-09-01) |
| Fred | Shipment | [2015-09-01,2018-01-01) |
| Sam | Management | [2016-01-01,2017-01-01) |
Results
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