ClickHouse/docs/ja/sql-reference/functions/uuid-functions.md
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---
machine_translated: true
machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
toc_priority: 53
toc_title: "UUID\u306E\u64CD\u4F5C"
---
# UUIDを操作するための関数 {#functions-for-working-with-uuid}
UUIDを操作するための関数を以下に示します。
## generateuidv4 {#uuid-function-generate}
を生成する。 [UUID](../../sql-reference/data-types/uuid.md) の [バージョン4](https://tools.ietf.org/html/rfc4122#section-4.4).
``` sql
generateUUIDv4()
```
**戻り値**
UUID型の値。
**使用例**
この例では、UUID型の列を持つテーブルを作成し、テーブルに値を挿入する方法を示します。
``` sql
CREATE TABLE t_uuid (x UUID) ENGINE=TinyLog
INSERT INTO t_uuid SELECT generateUUIDv4()
SELECT * FROM t_uuid
```
``` text
┌────────────────────────────────────x─┐
│ f4bf890f-f9dc-4332-ad5c-0c18e73f28e9 │
└──────────────────────────────────────┘
```
## トウイド(x) {#touuid-x}
文字列型の値をUUID型に変換します。
``` sql
toUUID(String)
```
**戻り値**
UUID型の値。
**使用例**
``` sql
SELECT toUUID('61f0c404-5cb3-11e7-907b-a6006ad3dba0') AS uuid
```
``` text
┌─────────────────────────────────uuid─┐
│ 61f0c404-5cb3-11e7-907b-a6006ad3dba0 │
└──────────────────────────────────────┘
```
## UUIDStringToNum {#uuidstringtonum}
形式で36文字を含む文字列を受け入れます `xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx` これを、aのバイトセットとして返します [FixedString(16)](../../sql-reference/data-types/fixedstring.md).
``` sql
UUIDStringToNum(String)
```
**戻り値**
FixedString(16)
**使用例**
``` sql
SELECT
'612f3c40-5d3b-217e-707b-6a546a3d7b29' AS uuid,
UUIDStringToNum(uuid) AS bytes
```
``` text
┌─uuid─────────────────────────────────┬─bytes────────────┐
│ 612f3c40-5d3b-217e-707b-6a546a3d7b29 │ a/<@];!~p{jTj={) │
└──────────────────────────────────────┴──────────────────┘
```
## UUIDNumToString {#uuidnumtostring}
受け入れるa [FixedString(16)](../../sql-reference/data-types/fixedstring.md) テキスト形式で36文字を含む文字列を返します。
``` sql
UUIDNumToString(FixedString(16))
```
**戻り値**
文字列
**使用例**
``` sql
SELECT
'a/<@];!~p{jTj={)' AS bytes,
UUIDNumToString(toFixedString(bytes, 16)) AS uuid
```
``` text
┌─bytes────────────┬─uuid─────────────────────────────────┐
│ a/<@];!~p{jTj={) │ 612f3c40-5d3b-217e-707b-6a546a3d7b29 │
└──────────────────┴──────────────────────────────────────┘
```
## も参照。 {#see-also}
- [dictGetUUID](ext-dict-functions.md#ext_dict_functions-other)
[元の記事](https://clickhouse.tech/docs/en/query_language/functions/uuid_function/) <!--hide-->