Extract day from date in PostgreSQL

To extract the day from a date in PostgreSQL, you can use the DATE_PART() function with the ‘day’ unit.

Syntax for DATE_PART() Function in PostgreSQL:

unit: Specifies the part of the date or timestamp to extract (e.g., ‘year’, ‘month’, ‘day’, ‘hour’, ‘minute’, ‘second’, etc.).

source: The date or timestamp from which to extract the specified part.

In Our case. The values of the unit must be “day”

Extract Day from Date in postgresql Simple Example:

In order to Extract day from date in postgresql we will be using  DATE_PART() function.

In the below Example we will be passing day as “unit” argument and date as “source” argument in order to extract day from Date or datetime

 

SELECT DATE_PART('day', '2024-02-24'::timestamp) AS day_part;

Output:

Extract Day from Current date in postgresql :

This query uses the CURRENT_DATE function to get the current date and then extracts the day from current date using DATE_PART()

 

SELECT CURRENT_DATE AS current_date, DATE_PART('day', CURRENT_DATE) AS day_part;

Output:

Extract Day part from Date in postgresql table:

We will be using  Below Student_detail table for our example to depict on how to extract day part from timestamp in postgresql

Student_detail:

In the above table we will be using DATE_PART() Function, which will take “day”  and column named “birthdaytime” as argument. Which will extract day part from “birthdaytime” column and store in the new column of postgresql table as shown below

 

select *, DATE_PART('day', birthdaytime::timestamp) AS day_part from Student_detail

so the resultant table will have day_part column

Extract Day part from Datetime in postgresql table using Extract():

We will be using Below Student_detail table for our example to depict on how to extract day part from datetime in postgresql

Student_detail:

In the above table we will be using  EXTRACT() Function, which will take “day” and column named “birthdaytime” as argument. Which will extract day from “birthdaytime” column and store in the new column of postgresql table as shown below

 

Select *, extract(DAY FROM birthdaytime) as day_part from student_detail

So the resultant table will have day_part column