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TO_START_OF_DAY

Rounds down a date with time (timestamp/datetime) to the start of the day.

Syntax​

to_start_of_day( <expr> )

Arguments​

ArgumentsDescription
<expr>timestamp

Return Type​

Datetime object, returns date in “YYYY-MM-DD hh:mm:ss.ffffff” format.

Examples​

SELECT to_start_of_day(now());
+----------------------------+
| to_start_of_day(now())     |
+----------------------------+
| 2022-10-15 00:00:00.000000 |
+----------------------------+

SELECT to_start_of_day(to_timestamp(1630812366));
+-------------------------------------------+
| to_start_of_day(to_timestamp(1630812366)) |
+-------------------------------------------+
| 2021-09-05 00:00:00.000000                |
+-------------------------------------------+