How to join two tables while one is using Date and another is using Timestamp?

How to join two tables while one is using Date and another is using Timestamp on Oracle, for example, select * from Orders o, AuditLog a where o.TradeDate = a.EventTs Orders ======= TradeDate (Date) e.g. 14-JUN-08 AuditLog ========= EventTs (Timestamp) e.g. 12-JUN-08 10.28.53.083000000 AM Thanks! Regards