User interfaces for database tables typically shield users from {TAIL ~ a complete table definition} at {HEAD ~ one time} 
User interfaces for database tables typically shield users from { TAIL ~ a complete table definition } at { HEAD ~ one time }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD