Filter syntax

I'm trying to apply a filter on a feature service in essential manager.

 

I want to filter the records so that they only display events from the last 14 days.  What is the proper sytanx for this?

 

I've tried Event_Date >= (sysdate - 14) and Event_Date >= sysdate - 14 but nothing gets returned.

 

 

Any help would be greatly appreciated.

 

 

Thanks