ZCOUNT
Initial
Play 1
Play 2
Play 3
Play 4
Play 5
ZCOUNT key min max
ZCOUNT myzip -inf +inf
ZCOUNT myzip 3 +inf
ZCOUNT myzip 2 4
ZCOUNT myzip
(
2 4
ZCOUNT myzip
(
2
(
4
myzip
1
New Delhi
2
Seoul
3
Beijing
4
New York
INDEX
REVERSE
INDEX
0
1
2
3
-4
-3
-2
-1