generate_series Table Function

Alias: generateSeries

Syntax

Returns a table with the single 'generate_series' column (UInt64) that contains integers from start to stop inclusively:

generate_series(START, STOP)

Returns a table with the single 'generate_series' column (UInt64) that contains integers from start to stop inclusively with spacing between values given by STEP:

generate_series(START, STOP, STEP)

STEP can be negative, in which case the series is generated in descending order from START down to STOP. If STEP is negative and START < STOP, the result is empty.

Examples

The following queries return tables with the same content but different column names:

SELECT * FROM numbers(10, 5);

┌─number─┐
│     10 │
│     11 │
│     12 │
│     13 │
│     14 │
└────────┘

SELECT * FROM generate_series(10, 14);

┌─generate_series─┐
│              10 │
│              11 │
│              12 │
│              13 │
│              14 │
└─────────────────┘

And the following queries return tables with the same content but different column names (but the second option is more efficient):

SELECT * FROM numbers(10, 11) WHERE number % 3 == (10 % 3);

┌─number─┐
│     10 │
│     13 │
│     16 │
│     19 │
└────────┘

SELECT * FROM generate_series(10, 20, 3);

┌─generate_series─┐
│              10 │
│              13 │
│              16 │
│              19 │
└─────────────────┘

Generate a descending series:

SELECT * FROM generate_series(9, 0, -1);

┌─generate_series─┐
│               9 │
│               8 │
│               7 │
│               6 │
│               5 │
│               4 │
│               3 │
│               2 │
│               1 │
│               0 │
└─────────────────┘