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22 lines
1.2 KiB
Markdown
22 lines
1.2 KiB
Markdown
# numbers
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`numbers(N)` - возвращает таблицу с единственным столбцом `number` (UInt64), содержащим натуральные числа от `0` до `N-1`.
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`numbers(N, M)` - возвращает таблицу с единственным столбцом `number` (UInt64), содержащим натуральные числа от `N` to `(N + M - 1)`.
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Так же как и таблица `system.numbers` может использоваться для тестов и генерации последовательных значений. Функция `numbers(N, M)` работает более эффективно, чем выборка из `system.numbers`.
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Следующие запросы эквивалентны:
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```sql
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SELECT * FROM numbers(10);
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SELECT * FROM numbers(0,10);
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SELECT * FROM system.numbers LIMIT 10;
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```
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Примеры:
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```sql
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-- генерация последовательности всех дат от 2010-01-01 до 2010-12-31
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select toDate('2010-01-01') + number as d FROM numbers(365);
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```
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[Оригинальная статья](https://clickhouse.yandex/docs/ru/query_language/table_functions/numbers/) <!--hide-->
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