1. A computer system, comprising: a central processor; page storage means for storing page addressable data; main storage means, coupled to the central processor and the page storage means, for storing data which is addressable by the central processor and the page storage means; and a database coprocessor, coupled to the page storage means, the database coprocessor comprising; interface means for accessing the page addressable data having no further intervention of the central processor, extractor means, coupled to said interface means, for receiving database commands from said central processor, for extracting data to be processed from one of said main storage means and said page storage means and for assembling final result data to be stored in one of said main storage means and said page storage means, said database commands corresponding to a plurality of database processing functions, a single invocation of said coprocessor being for executing said plurality of database functions, local memory means coupled to the extractor means for temporarily storing the data to be processed, a plurality of processing element means, each of said plurality of processing element means being coupled to the extractor means and the local memory means, for autonomously performing said database processing subfunctions including autonomous accessing of said local memory means for read and write operations in response to subfunction commands; control processor means, coupled to the extractor means and said plurality of processing element means, for identifying database commands in the data to be processed, for parsing the database commands into subfunction commands, and for distributing the subfunction commands among the processing element means to control autonomous processing of said data to be processed, in a pipeline manner, in accordance with said subfunction commands, control bus means for communicating commands from the control processor means to the extractor means and the plurality of processing element means, and data bus means for exchanging data between the extractor means whereby the extractor means and said plurality of processing element means each utilize said local memory in common, the local memory means, and the plurality of processing element means.