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