In computer system, Database may be certain or uncertain. For storing and retrieving data from uncertain database, there is no mechanism in RDBMS. There are many uncertain and probabilistic database management system such as TRIO, ULDB etc. This book provide the one efficient way of handling uncertain and probabilistic database.To work on uncertain database, system provides the facility to store and manage data in uncertain and probabilistic database. It identifies uncertain and certain data by using colour scheme. It provides the mechanism for retrieval of data way for different type of quires.