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  • Introduction
    • Overview
    • Core Features
    • Benefits
  • Quick Start
    • 1. Install YugaByte DB
    • 2. Create Local Cluster
    • 3. Test Cassandra API
    • 4. Test Redis API
    • 5. Run Sample Apps
  • Explore
    • 1. Linear Scalability
    • 2. Fault Tolerance
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  • Develop
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  • API Reference
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      • INCR
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API Reference Redis

ZCARD

    • SYNOPSIS
    • RETURN VALUE
    • EXAMPLES
    • SEE ALSO

SYNOPSIS

ZCARD key
This command returns the number of members in the sorted set at key. If key does not exist, 0 is returned. If key is associated with non sorted-set data, an error is returned.

RETURN VALUE

The cardinality of the sorted set.

EXAMPLES

$ ZADD z_key 1.0 v1 2.0 v2
(integer) 2
$ ZADD z_key 3.0 v2
(integer) 0
$ ZCARD z_key 
(integer) 2
$ ZCARD ts_key 
(integer) 0

SEE ALSO

zadd, zrangebyscore, zrem, zrevrange

ZADD
ZRANGEBYSCORE
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