One of the most difficult types of payroll fraud to detect is that of ghost employees - particularly where large ...

It’s concerning that issue of re-using identifiers and re-using employee ID numbers. At the risk of further muddying things, let’s take a final look (for now) at the issues.

In this example, you will first create an inner join that relates employee identification number and salary. Then, you will create an outer join that combines this data with data from another table to ...