Users are given specific subsets of the database information to view at a given time, such as {HEAD ~ column definitions} or {TAIL ~ the primary key definition} 
Users are given specific subsets of the database information to view at a given time , such as { HEAD ~ column definitions } or { TAIL ~ the primary key definition }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL