2022-08-26 19:07:59 +00:00
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---
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slug: /zh/operations/system-tables/numbers
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---
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2021-12-26 04:26:43 +00:00
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# system.numbers {#system-numbers}
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2020-06-22 08:45:22 +00:00
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2021-12-26 04:26:43 +00:00
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这个表有一个名为 `number` 的 UInt64 列，包含了几乎所有从 0 开始的自然数。
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2020-06-22 08:45:22 +00:00
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2021-12-26 04:26:43 +00:00
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你可以用这个表进行测试，或者如果你需要进行暴力搜索。
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2020-06-22 08:45:22 +00:00
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2021-12-26 04:26:43 +00:00
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从该表的读取是不并行的。
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2020-06-22 08:45:22 +00:00
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2021-12-26 04:26:43 +00:00
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**示例**
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```sql
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2023-01-11 13:43:51 +00:00
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SELECT * FROM system.numbers LIMIT 10;
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2021-12-26 04:26:43 +00:00
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```
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2023-01-11 14:59:23 +00:00
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```response
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2021-12-26 04:26:43 +00:00
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┌─number─┐
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│ 0 │
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│ 1 │
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│ 2 │
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│ 3 │
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│ 4 │
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│ 5 │
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│ 6 │
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│ 7 │
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│ 8 │
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│ 9 │
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└────────┘
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10 rows in set. Elapsed: 0.001 sec.
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```
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