Abstract: A candidate key retrieving apparatus, a candidate key retrieving method and a tangible machine-readable medium thereof are provided. The candidate key retrieving apparatus comprises a storage unit and a microprocessor. The storage unit is configured to store a table recording a data amount of the table, a plurality of attributes, and a data distinct amount and a data type of each attribute. The microprocessor is configured to generate a candidate key according to the data amount, the distinct amounts and the data types.

Abstract: A behavior pattern recognition method, system and a computer application program thereof are presented. The method is applicable to an electronic device which has a storage unit for storing multiple sets of behavior record information, and the method includes the following step. Firstly, a first detecting unit acquires first behavior feature information, a collaboration network module acquires at least one second detecting unit having coherence with the first detecting unit. Then, the at least one second detecting unit acquires at least one second behavior feature information, and a processing unit compares the at least one second behavior feature information and the behavior record information to generate at least one comparison result. Finally, a behavior definition represented by the first behavior feature information is determined according to the comparison result.

Abstract: A candidate key retrieving apparatus, a candidate key retrieving method and a tangible machine-readable medium thereof are provided. The candidate key retrieving apparatus comprises a storage unit and a microprocessor. The storage unit is configured to store a table recording a data amount of the table, a plurality of attributes, and a data distinct amount and a data type of each attribute. The microprocessor is configured to generate a candidate key according to the data amount, the distinct amounts and the data types.