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TO_START_OF_HOUR

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

Syntax​

TO_START_OF_HOUR(<expr>)

Arguments​

ArgumentsDescription
<expr>timestamp

Return Type​

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

Examples​

SELECT to_start_of_hour(now());
+----------------------------+
| to_start_of_hour(now())    |
+----------------------------+
| 2022-10-15 03:00:00.000000 |
+----------------------------+

SELECT to_start_of_hour(to_timestamp(1630812366));
+--------------------------------------------+
| to_start_of_hour(to_timestamp(1630812366)) |
+--------------------------------------------+
| 2021-09-05 03:00:00.000000                 |
+--------------------------------------------+