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TO_HOUR

Converts a date with time to a UInt8 number containing the number of the hour in 24-hour time (0-23). This function assumes that if clocks are moved ahead, it is by one hour and occurs at 2 a.m., and if clocks are moved back, it is by one hour and occurs at 3 a.m. (which is not always true – even in Moscow the clocks were twice changed at a different time).

Syntax​

to_hour( <expr> )

Arguments​

ArgumentsDescription
<expr>datetime

Return Type​

UInt8 datatype.

Examples​

SELECT to_hour(now());
+---------------+
| to_hour(now()) |
+---------------+
|             6 |
+---------------+

SELECT to_hour(to_datetime(1630812366));
+--------------------------------+
| to_hour(to_datetime(1630812366)) |
+--------------------------------+
|                              3 |
+--------------------------------+