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39 | 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).
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;
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);