{
  "schema_version": 2,
  "id": "commands/hsetnx",
  "title": "HSETNX",
  "url": "https://redis.io/docs/latest/commands/hsetnx/",
  "summary": "Sets the value of a field in a hash only when the field doesn't exist.",
  "since": "2.0.0",
  "tags": [
    "docs",
    "develop",
    "stack",
    "oss",
    "rs",
    "rc",
    "oss",
    "kubernetes",
    "clients"
  ],
  "last_updated": "2026-07-24T11:07:00+02:00",
  "page_type": "content",
  "content_hash": "cd3bac9c63a8b5722edf3fe2070b4bfe31a96172447a903e04f0e7791e56e124",
  "sections": [
    {
      "id": "overview",
      "title": "Overview",
      "role": "overview",
      "text": "Sets `field` in the hash stored at `key` to `value`, only if `field` does not\nyet exist.\nIf `key` does not exist, a new key holding a hash is created.\nIf `field` already exists, this operation has no effect."
    },
    {
      "id": "required-arguments",
      "title": "Required arguments",
      "role": "content",
      "text": "<details open><summary><code>key</code></summary>\n\nThe name of the key that holds the hash.\n\n</details>\n\n<details open><summary><code>field</code></summary>\n\nThe field to set, only if it does not already exist.\n\n</details>\n\n<details open><summary><code>value</code></summary>\n\nThe value to set.\n\n</details>"
    },
    {
      "id": "examples",
      "title": "Examples",
      "role": "example",
      "text": "redis> HSETNX myhash field \"Hello\"\n(integer) 1\nredis> HSETNX myhash field \"World\"\n(integer) 0\nredis> HGET myhash field\n\"Hello\""
    },
    {
      "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\nOne of the following:\n* [Integer reply](../../develop/reference/protocol-spec#integers): `0` if the field already exists in the hash and no operation was performed.\n* [Integer reply](../../develop/reference/protocol-spec#integers): `1` if the field is a new field in the hash and the value was set.\n\n**RESP3:**\n\nOne of the following:\n* [Integer reply](../../develop/reference/protocol-spec#integers): `0` if the field already exists in the hash and no operation was performed.\n* [Integer reply](../../develop/reference/protocol-spec#integers): `1` if the field is a new field in the hash and the value was set."
    }
  ],
  "examples": []
}