PostgreSQL DATE_PART() function
DATE_PART() function
The PostgreSQL DATE_PART() function is used to extract a specific part of a date and time value, such as the year, month, day, hour, minute, second, etc.
Uses of DATE_PART() Function
- Extract Year: Retrieve the year part from a timestamp or date.
- Extract Month: Retrieve the month part from a timestamp, date, or interval.
- Extract Day: Retrieve the day part from a timestamp or date.
- Extract Hour: Retrieve the hour part from a timestamp.
- Extract Minute: Retrieve the minute part from a timestamp.
- Extract Second: Retrieve the second part from a timestamp.
- Extract Part from Interval: Retrieve specific parts from an interval, such as years, months, days, etc.
Syntax:
date_part(text, timestamp) or date_part(text, interval)
Return Type: double precision.
PostgreSQL Version: 9.3
Pictorial Presentation of PostgreSQL DATE_PART() function
Example 1: PostgreSQL DATE_PART() function
The example below finds the hour part from the timestamp (date and time specified in the argument) .
code:
SELECT date_part('hour', timestamp '2002-09-17 19:27:45');
Sample Output:
date_part ----------- 19 (1 row)
Example 2: PostgreSQL DATE_PART() function
The example below extracts the months part the given age.
Code:
SELECT date_part('month', interval '3 years 7 months');
Sample Output:
date_part ----------- 7 (1 row)
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