2020-03-30 12:48:55 +00:00
|
|
|
---
|
|
|
|
machine_translated: true
|
2020-05-15 04:34:54 +00:00
|
|
|
machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
|
2020-04-04 09:15:31 +00:00
|
|
|
toc_priority: 47
|
|
|
|
toc_title: generateRandom
|
2020-03-30 12:48:55 +00:00
|
|
|
---
|
|
|
|
|
|
|
|
# generateRandom {#generaterandom}
|
|
|
|
|
2020-04-04 09:15:31 +00:00
|
|
|
Genera datos aleatorios con un esquema dado.
|
|
|
|
Permite rellenar tablas de prueba con datos.
|
|
|
|
Admite todos los tipos de datos que se pueden almacenar en la tabla, excepto `LowCardinality` y `AggregateFunction`.
|
2020-03-30 12:48:55 +00:00
|
|
|
|
|
|
|
``` sql
|
|
|
|
generateRandom('name TypeName[, name TypeName]...', [, 'random_seed'[, 'max_string_length'[, 'max_array_length']]]);
|
|
|
|
```
|
|
|
|
|
2020-04-04 09:15:31 +00:00
|
|
|
**Parámetros**
|
2020-03-30 12:48:55 +00:00
|
|
|
|
|
|
|
- `name` — Name of corresponding column.
|
|
|
|
- `TypeName` — Type of corresponding column.
|
|
|
|
- `max_array_length` — Maximum array length for all generated arrays. Defaults to `10`.
|
|
|
|
- `max_string_length` — Maximum string length for all generated strings. Defaults to `10`.
|
|
|
|
- `random_seed` — Specify random seed manually to produce stable results. If NULL — seed is randomly generated.
|
|
|
|
|
2020-04-04 09:15:31 +00:00
|
|
|
**Valor devuelto**
|
2020-03-30 12:48:55 +00:00
|
|
|
|
2020-04-04 09:15:31 +00:00
|
|
|
Un objeto de tabla con el esquema solicitado.
|
2020-03-30 12:48:55 +00:00
|
|
|
|
2020-05-15 04:34:54 +00:00
|
|
|
## Ejemplo de uso {#usage-example}
|
2020-03-30 12:48:55 +00:00
|
|
|
|
|
|
|
``` sql
|
2020-05-15 04:34:54 +00:00
|
|
|
SELECT * FROM generateRandom('a Array(Int8), d Decimal32(4), c Tuple(DateTime64(3), UUID)', 1, 10, 2) LIMIT 3;
|
2020-03-30 12:48:55 +00:00
|
|
|
```
|
|
|
|
|
|
|
|
``` text
|
|
|
|
┌─a────────┬────────────d─┬─c──────────────────────────────────────────────────────────────────┐
|
|
|
|
│ [77] │ -124167.6723 │ ('2061-04-17 21:59:44.573','3f72f405-ec3e-13c8-44ca-66ef335f7835') │
|
|
|
|
│ [32,110] │ -141397.7312 │ ('1979-02-09 03:43:48.526','982486d1-5a5d-a308-e525-7bd8b80ffa73') │
|
|
|
|
│ [68] │ -67417.0770 │ ('2080-03-12 14:17:31.269','110425e5-413f-10a6-05ba-fa6b3e929f15') │
|
|
|
|
└──────────┴──────────────┴────────────────────────────────────────────────────────────────────┘
|
|
|
|
```
|
|
|
|
|
2020-04-04 09:15:31 +00:00
|
|
|
[Artículo Original](https://clickhouse.tech/docs/en/query_language/table_functions/generate/) <!--hide-->
|