{HEAD ~ The retrieval} of data from a database in a computerized database management system is optimized through {TAIL ~ the use} of a plurality of join indexed 
{ HEAD ~ The retrieval } of data from a database in a computerized database management system is optimized through { TAIL ~ the use } of a plurality of join indexed
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH