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ClickHouse/docs/es/sql-reference/table-functions/generate.md
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true 3e185d24c9 47 generateRandom

generateRandom

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.

generateRandom('name TypeName[, name TypeName]...', [, 'random_seed'[, 'max_string_length'[, 'max_array_length']]]);

Parámetros

  • name — Name of corresponding column.
  • TypeName — Type of corresponding column.
  • limit — Number of rows to generate.
  • 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.

Valor devuelto

Un objeto de tabla con el esquema solicitado.

Ejemplo De Uso

SELECT * FROM generateRandom('a Array(Int8), d Decimal32(4), c Tuple(DateTime64(3), UUID)', 1, 10, 2);

┌─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') │
└──────────┴──────────────┴────────────────────────────────────────────────────────────────────┘

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