SEQUENCE

sequence

sequence

description

函数 array_range 的别称

Syntax

ARRAY<Int> sequence(Int end)
ARRAY<Int> sequence(Int start, Int end)
ARRAY<Int> sequence(Int start, Int end, Int step)
ARRAY<Datetime> sequence(Datetime start_datetime, Datetime end_datetime)
ARRAY<Datetime> sequence(Datetime start_datetime, Datetime end_datetime, INTERVAL Int interval_step UNIT)

1. 生成 int 数组： 参数均为正整数 start 默认为 0, step 默认为 1。 最终返回一个数组，从 start 到 end - 1, 步长为 step。
2. 生成日期时间数组： 至少取两个参数。 前两个参数都是 datetimev2，第三个是正整数。 如果缺少第三部分，则INTERVAL 1 DAY将为默认值。 UNIT 支持年/月/周/日/小时/分钟/秒。 返回 start_datetime 和最接近 end_datetime 之间的 datetimev2 数组（按 Interval_step UNIT 计算）。

notice

如果第三个参数 step/interval_step 为负数或者零, 函数结果将为NULL

example

mysql> select sequence(10);
+--------------------------------+
| sequence(10)                   |
+--------------------------------+
| [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] |
+--------------------------------+

mysql> select sequence(10,20);
+------------------------------------------+
| sequence(10, 20)                         |
+------------------------------------------+
| [10, 11, 12, 13, 14, 15, 16, 17, 18, 19] |
+------------------------------------------+

mysql> select sequence(0,20,2);
+-------------------------------------+
| sequence(0, 20, 2)                  |
+-------------------------------------+
| [0, 2, 4, 6, 8, 10, 12, 14, 16, 18] |
+-------------------------------------+

mysql> select sequence(cast('2022-05-15 12:00:00' as datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0))) AS sequence_default;
+------------------------------------------------+
| sequence_default                               |
+------------------------------------------------+
| ["2022-05-15 12:00:00", "2022-05-16 12:00:00"] |
+------------------------------------------------+

mysql> select sequence(cast('2019-05-15 12:00:00' as datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0)), interval 2 year) as sequence_2_year;
+------------------------------------------------+
| sequence_2_year                                |
+------------------------------------------------+
| ["2019-05-15 12:00:00", "2021-05-15 12:00:00"] |
+------------------------------------------------+

keywords

ARRAY, RANGE, SEQUENCE