Function dayOfWeek() calculates the day of week of a time value and returns that integer, where 1 stands for Sunday, 2 stands for Monday, 3 stands for Tuesday, and so on.

Arguments：

• Time <datetime | timestamp | string>

Returns：

• Day of week <number>

Common Usage

Example: Calculate day of week of each row of an alias

uncollect ["2023-04-30 22:30:35", "2020-01-15 09:03:16"] as a
return dayOfWeek(a)

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