Abstract: Preference queries are used in multi criteria decision making applications where a number of contradictory criteria are involved to select the most commodious answers to the user. Many modern applications agree to the streaming model of computation and therefore continuous query processing algorithms are required to refresh the query result. Examples of such emerging applications are technical data analysis, data organization in sensor networks, article filtering in information retrieval, web-based alerts, issue/subscribe services. Continuous processing of the preference queries is performed by using the sliding window technique which generates fairly accurate answer to data stream query by evaluating the recent data. A Brief overview of how the sliding window technique can be used with preference queries comprised in this survey.