Exemple sabrina (suite)
LISP ? (DE ( #:T:POINT #:T:POINT): distance (X Y)
LISP ? (SQRT (+ (** (- (CAR X) (CAR Y))))
LISP ? (** (- (CAR (CDR X)) (CAR (CDR Y))))))
LISP ? (save # ( #:T:POINT #:T:POINT): distance e)
LISP #:T:POINT #:T:POINT): distance
SQL > select L1.station, L2.station
SQL > Where distance ( L1.lieu, L2.lieu) < 10;