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ZLEXCOUNT

Last updated 
ZLEXCOUNT key min max
Group
Sorted set
Complexity
O(log(N)) where N is the size of the sorted set
Arity
4 (exactly, counting the command name)
Flags
read-only, fast
Keys
first 1, last 1, step 1
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ZLEXCOUNT returns how many members of the sorted set at key fall between min and max in byte-wise lexicographic order. It is meant for sorted sets where every member has the same score; with mixed scores the result is not meaningful.

Each bound must start with [ (inclusive) or ( (exclusive), followed by the value, or be - (lowest possible) or + (highest possible).

Return value

Section titled “Return value”
Case RESP2 RESP3
Success Integer: the number of members in the range Same
Key does not exist Integer 0 Same

Errors:

  • ERR min or max not valid string range item if a bound has the wrong form. The bounds are checked before the key is looked up.
  • WRONGTYPE if key holds a value that is not a sorted set.

Examples

Section titled “Examples”
127.0.0.1:6379> ZADD names 0 "ann" 0 "bob" 0 "cat" 0 "dan"
(integer) 4
127.0.0.1:6379> ZLEXCOUNT names - +
(integer) 4
127.0.0.1:6379> ZLEXCOUNT names [b (d
(integer) 2

Compatibility

Section titled “Compatibility”

Same as Redis 7.4 and Valkey 8.

See also

Section titled “See also”

ZRANGEBYLEX, ZREMRANGEBYLEX, ZCOUNT