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57 lines
973 B
Markdown
57 lines
973 B
Markdown
---
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slug: /en/operations/system-tables/numbers
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---
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# numbers
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This table contains a single UInt64 column named `number` that contains almost all the natural numbers starting from zero.
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You can use this table for tests, or if you need to do a brute force search.
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Reads from this table are not parallelized.
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**Example**
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```sql
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SELECT * FROM system.numbers LIMIT 10;
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```
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```response
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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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You can also limit the output by predicates.
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```sql
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SELECT * FROM system.numbers < 10;
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```
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```response
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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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