PostgreSQL DATE_TRUNC() function

DATE_TRUNC() function

The PostgreSQL DATE_TRUNC() function is used to truncate a timestamp to the specified precision, such as hour, day, week, month, etc.

Uses of DATE_TRUNC() Function

• Truncate to Year: Truncate a timestamp to the beginning of the year.


• Truncate to Month: Truncate a timestamp to the beginning of the month.


• Truncate to Day: Truncate a timestamp to the beginning of the day.


• Truncate to Hour: Truncate a timestamp to the beginning of the hour.


• Truncate to Minute: Truncate a timestamp to the beginning of the minute.


• Truncate to Second: Truncate a timestamp to the beginning of the second.

Syntax:

date_trunc(text, timestamp)

Return Type: timestamp.

PostgreSQL Version: 9.3

Visual Presentation of PostgreSQL DATE_TRUNC() function

Example: PostgreSQL DATE_TRUNC() function :

Example:

SQL Code:

SELECT date_trunc('hour', timestamp '2002-09-17 19:27:45');

Output:

     date_trunc
---------------------
 2002-09-17 19:00:00
(1 row)

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