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slug | sidebar_position | sidebar_label |
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/en/sql-reference/table-functions/numbers | 145 | numbers |
numbers
numbers(N)
– Returns a table with the single ‘number’ column (UInt64) that contains integers from 0 to N-1.
numbers(N, M)
- Returns a table with the single ‘number’ column (UInt64) that contains integers from N to (N + M - 1).
numbers(N, M, S)
- Returns a table with the single ‘number’ column (UInt64) that contains integers from N to (N + M - 1) with step S.
Similar to the system.numbers
table, it can be used for testing and generating successive values, numbers(N, M)
more efficient than system.numbers
.
The following queries are equivalent:
SELECT * FROM numbers(10);
SELECT * FROM numbers(0, 10);
SELECT * FROM system.numbers LIMIT 10;
SELECT * FROM system.numbers WHERE number BETWEEN 0 AND 9;
SELECT * FROM system.numbers WHERE number IN (0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
And the following queries are equivalent:
SELECT number * 2 FROM numbers(10);
SELECT (number - 10) * 2 FROM numbers(10, 10);
SELECT * FROM numbers(0, 20, 2);
Examples:
-- Generate a sequence of dates from 2010-01-01 to 2010-12-31
select toDate('2010-01-01') + number as d FROM numbers(365);