Materialize Documentation
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date_trunc function

date_trunc computes ts_val’s “floor value” of the specified time component, i.e. the largest time component less than or equal to the provided value.

To align values along arbitrary values, see date_bin.


date_trunc ( ' microseconds milliseconds second minute hour day week month quarter year decade century millenium ' , ts_val )
Parameter Type Description
ts_val timestamp, timestamp with time zone The value you want to truncate.

Return value

date_trunc returns the same type as ts_val.


SELECT date_trunc('hour', TIMESTAMP '2019-11-26 15:56:46.241150') AS hour_trunc;
 2019-11-26 15:00:00.000000000

SELECT date_trunc('year', TIMESTAMP '2019-11-26 15:56:46.241150') AS year_trunc;
 2019-01-01 00:00:00.000000000
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