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973 B
973 B
slug |
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/en/operations/system-tables/numbers |
numbers
This table contains a single UInt64 column named number
that contains almost all the natural numbers starting from zero.
You can use this table for tests, or if you need to do a brute force search.
Reads from this table are not parallelized.
Example
SELECT * FROM system.numbers LIMIT 10;
┌─number─┐
│ 0 │
│ 1 │
│ 2 │
│ 3 │
│ 4 │
│ 5 │
│ 6 │
│ 7 │
│ 8 │
│ 9 │
└────────┘
10 rows in set. Elapsed: 0.001 sec.
You can also limit the output by predicates.
SELECT * FROM system.numbers < 10;
┌─number─┐
│ 0 │
│ 1 │
│ 2 │
│ 3 │
│ 4 │
│ 5 │
│ 6 │
│ 7 │
│ 8 │
│ 9 │
└────────┘
10 rows in set. Elapsed: 0.001 sec.