ClickHouse/docs/fr/sql-reference/data-types/domains/ipv4.md
Ivan Blinkov cd14f9ebcb
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Markdown

---
machine_translated: true
machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
toc_priority: 59
toc_title: IPv4
---
## IPv4 {#ipv4}
`IPv4` est un domaine basé sur `UInt32` tapez et sert de remplacement typé pour stocker des valeurs IPv4. Il fournit un stockage compact avec le format d'entrée-sortie convivial et les informations de type de colonne sur l'inspection.
### Utilisation De Base {#basic-usage}
``` sql
CREATE TABLE hits (url String, from IPv4) ENGINE = MergeTree() ORDER BY url;
DESCRIBE TABLE hits;
```
``` text
┌─name─┬─type───┬─default_type─┬─default_expression─┬─comment─┬─codec_expression─┐
│ url │ String │ │ │ │ │
│ from │ IPv4 │ │ │ │ │
└──────┴────────┴──────────────┴────────────────────┴─────────┴──────────────────┘
```
Ou vous pouvez utiliser le domaine IPv4 comme clé:
``` sql
CREATE TABLE hits (url String, from IPv4) ENGINE = MergeTree() ORDER BY from;
```
`IPv4` le domaine prend en charge le format d'entrée personnalisé en tant que chaînes IPv4:
``` sql
INSERT INTO hits (url, from) VALUES ('https://wikipedia.org', '116.253.40.133')('https://clickhouse.tech', '183.247.232.58')('https://clickhouse.yandex/docs/en/', '116.106.34.242');
SELECT * FROM hits;
```
``` text
┌─url────────────────────────────────┬───────────from─┐
│ https://clickhouse.tech/docs/en/ │ 116.106.34.242 │
│ https://wikipedia.org │ 116.253.40.133 │
│ https://clickhouse.tech │ 183.247.232.58 │
└────────────────────────────────────┴────────────────┘
```
Les valeurs sont stockées sous forme binaire compacte:
``` sql
SELECT toTypeName(from), hex(from) FROM hits LIMIT 1;
```
``` text
┌─toTypeName(from)─┬─hex(from)─┐
│ IPv4 │ B7F7E83A │
└──────────────────┴───────────┘
```
Les valeurs de domaine ne sont pas implicitement convertibles en types autres que `UInt32`.
Si vous voulez convertir `IPv4` valeur à une chaîne, vous devez le faire explicitement avec `IPv4NumToString()` fonction:
``` sql
SELECT toTypeName(s), IPv4NumToString(from) as s FROM hits LIMIT 1;
```
┌─toTypeName(IPv4NumToString(from))─┬─s──────────────┐
│ String │ 183.247.232.58 │
└───────────────────────────────────┴────────────────┘
Ou coulé à un `UInt32` valeur:
``` sql
SELECT toTypeName(i), CAST(from as UInt32) as i FROM hits LIMIT 1;
```
``` text
┌─toTypeName(CAST(from, 'UInt32'))─┬──────────i─┐
│ UInt32 │ 3086477370 │
└──────────────────────────────────┴────────────┘
```
[Article Original](https://clickhouse.tech/docs/en/data_types/domains/ipv4) <!--hide-->