DATABASE SYSTEM

PURPOSE: To provide a database system reducing a usage rate in various kinds of resources and speeding-up a retrieval processing in a whole system. CONSTITUTION: A data processor 4 is provided with a storage device 8 constructing a database 18, a transmitting part 10 and a receiving part 12 which exchange data through a network 2, a throw-in function part 14 compressing a received record at every column and registering it in the database 18 together with column position information and a retrieval function part 16 which compresses retrieval key data at the time of a coincidence retrieval so as to compare it with column data to be a retrieval object which being kept compressed, and expands only column data of the retrieval object in another case so as to compare it with retrieval key data and obtains a result set. The data processor 6 is provided with a column data expanding part 40 which divides and expands the record at every column based on the record and column position information received by a communication part 34 from the data processor 4 through the network 2 so as to give it to an application program.