{
  "schema_version": 2,
  "id": "commands/zintercard",
  "title": "ZINTERCARD",
  "url": "https://redis.io/docs/latest/commands/zintercard/",
  "summary": "Returns the number of members of the intersect of multiple sorted sets.",
  "since": "7.0.0",
  "tags": [
    "docs",
    "develop",
    "stack",
    "oss",
    "rs",
    "rc",
    "oss",
    "kubernetes",
    "clients"
  ],
  "last_updated": "2026-09-18T09:48:43+01:00",
  "page_type": "content",
  "content_hash": "905aa63379c83bd5a09951d9be54c03e30e60acd994a2c08e4cbc65525e9e0ed",
  "sections": [
    {
      "id": "overview",
      "title": "Overview",
      "role": "overview",
      "text": "> [!NOTE]\n> This command's behavior varies in clustered Redis environments. See the [multi-key operations](https://redis.io/docs/latest/develop/using-commands/multi-key-operations) page for more information.\n\n\nThis command is similar to [`ZINTER`](https://redis.io/docs/latest/commands/zinter), but instead of returning the result set, it returns just the cardinality of the result.\n\nKeys that do not exist are considered to be empty sets.\nWith one of the keys being an empty set, the resulting set is also empty (since set intersection with an empty set always results in an empty set).\n\nBy default, the command calculates the cardinality of the intersection of all given sets.\nWhen provided with the optional `LIMIT` argument (which defaults to 0 and means unlimited), if the intersection cardinality reaches limit partway through the computation, the algorithm will exit and yield limit as the cardinality.\nSuch implementation ensures a significant speedup for queries where the limit is lower than the actual intersection cardinality."
    },
    {
      "id": "required-arguments",
      "title": "Required arguments",
      "role": "content",
      "text": "<details open><summary><code>numkeys</code></summary>\n\nThe number of keys that follow.\n\n</details>\n\n<details open><summary><code>key [key ...]</code></summary>\n\nOne or more sorted-set keys to intersect.\n\n</details>"
    },
    {
      "id": "optional-arguments",
      "title": "Optional arguments",
      "role": "parameters",
      "text": "<details open><summary><code>LIMIT limit</code></summary>\n\nStop counting once the cardinality reaches `limit`. `0` (the default) means no limit.\n\n</details>"
    },
    {
      "id": "examples",
      "title": "Examples",
      "role": "example",
      "text": "redis> ZADD zset1 1 \"one\"\n(integer) 1\nredis> ZADD zset1 2 \"two\"\n(integer) 1\nredis> ZADD zset2 1 \"one\"\n(integer) 1\nredis> ZADD zset2 2 \"two\"\n(integer) 1\nredis> ZADD zset2 3 \"three\"\n(integer) 1\nredis> ZINTER 2 zset1 zset2\n1) \"one\"\n2) \"two\"\nredis> ZINTERCARD 2 zset1 zset2\n(integer) 2\nredis> ZINTERCARD 2 zset1 zset2 LIMIT 1\n(integer) 1"
    },
    {
      "id": "redis-software-and-redis-cloud-compatibility",
      "title": "Redis Software and Redis Cloud compatibility",
      "role": "content",
      "text": "| Redis<br />Software | Redis<br />Cloud | <span style=\"min-width: 9em; display: table-cell\">Notes</span> |\n|:----------------------|:-----------------|:------|\n| <span title=\"Supported\">&#x2705; Standard</span><br /><span title=\"Supported\"><nobr>&#x2705; Active-Active</nobr></span> | <span title=\"Supported\">&#x2705; Standard</span><br /><span title=\"Supported\"><nobr>&#x2705; Active-Active</nobr></span> |  |"
    },
    {
      "id": "return-information",
      "title": "Return information",
      "role": "returns",
      "text": "**RESP2:**\n\n[Integer reply](../../develop/reference/protocol-spec#integers): the number of members in the resulting intersection.\n\n**RESP3:**\n\n[Integer reply](../../develop/reference/protocol-spec#integers): the number of members in the resulting intersection."
    }
  ],
  "examples": []
}