Redis Sorted Sets: ZCOUNT
ZCOUNT key min max
Redis ZCOUNT command is used to return the number of elements in the sorted set at the key with a score between minimum and maximum.
Syntax:
ZCOUNT KEY_NAME
Available since
2.0.0.
Return Value
Integer replies the number of elements in the specified score range.
Return Value Type
Integer
Example: Redis ZCOUNT: Any member may belong to the set
127.0.0.1:6379> ZADD mycolorset 528 white 2514 black 850 red 128 pink 742 yellow (integer) 5 127.0.0.1:6379> ZADD mycolorset 158 orange 1500 green 645 blue 426 gray (integer) 4 127.0.0.1:6379> ZCOUNT mycolorset -inf +inf (integer) 9
Example : Redis ZCOUNT : When the value is over 800 or more
127.0.0.1:6379> ZADD mycolorset 528 white 2514 black 850 red 128 pink 742 yellow (integer) 5 127.0.0.1:6379> ZADD mycolorset 158 orange 1500 green 645 blue 426 gray (integer) 4 127.0.0.1:6379> ZCOUNT mycolorset 800 +inf (integer) 3
Example: Redis ZCOUNT: When the value among 100 and 500
127.0.0.1:6379> ZADD mycolorset 528 white 2514 black 850 red 128 pink 742 yellow (integer) 5 127.0.0.1:6379> ZADD mycolorset 158 orange 1500 green 645 blue 426 gray (integer) 4 127.0.0.1:6379> ZCOUNT mycolorset 100 500 (integer) 3
Example: Redis ZCOUNT: When the value among 300 and less
127.0.0.1:6379> ZADD mycolorset 528 white 2514 black 850 red 128 pink 742 yellow (integer) 5 127.0.0.1:6379> ZADD mycolorset 158 orange 1500 green 645 blue 426 gray (integer) 4 127.0.0.1:6379> ZCOUNT mycolorset -inf 300 (integer) 2
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