Want to display same date regardless of whether employee has a deferral or not.

Question

I want to retrieve a pay date from say PayRoll table called PayrollDate.
For this I would like to display the same Payroll date for all employees regardless of whether the employee has had a deferral or not. How would I go about this.
I have been dabbling in Case Satements, but I still get null values...
Any help?