In order to add weeks to date in PostgreSQL we will using two approach one by using the + operator and other using the Interval. datatype. Here are examples of both approaches. Also, we will look at how to Add weeks to date column in PostgreSQL table.
Add weeks to date in PostgreSQL using INTERVAL data type:
We will be Using the INTERVAL data type to add weeks to datetime in PostgreSQL. When we add weeks to date using INTERVAL datatype the output will be in datetime(timestamp) format. In below example, we have added 1 week to date using Interval data type.
Example 1:
SELECT '2024-02-24'::date + INTERVAL '1 Weeks' as new_date
Output:
Add weeks to datetime in PostgreSQL using make_interval() function:
We will be Using the make_interval() function to add weeks to datetime in PostgreSQL. When we add weeks to date using the make_interval() function, the output will be in datetime(timestamp) format. In below example, we have added 1 week to date
Example 1:
SELECT '2024-02-24'::date + make_interval(weeks => 1) as new_date
Output:
Add weeks to date in PostgreSQL using simple addition (+) operator (roundabout way):
As mentioned, it’s a roundabout way. In the below example we have used simple addition to Add weeks to date in PostgreSQL. We have added 7 days (which is 1 week) to date in below example.
Example 1:
SELECT '2024-02-24'::date + 7 as new_date
Output:
Add weeks to datetime column in PostgreSQL table using Interval datatype:
We will be using below student_detail1 table for our example to depict on how to add weeks to datetime column in postgresql table.
student_detail1:
We have added 2 Weeks to datetime column using INTERVAL datatype in postgresql and new column named new_date is being created as shown below.
select *, birthdaytime::timestamp + INTERVAL '2 WEEKS' as new_date from student_detail1
Output:
Add Weeks to datetime column in PostgreSQL table using make_interval() function:
We will have added 2 weeks to datetime column using make_interval() function in postgresql and new column named new_date is being created as shown below.
select *,birthdaytime + make_interval(weeks => 2) as new_date from student_detail1
Output:
Add Weeks to date column in PostgreSQL table using Additional (+) operator (roundabout way) :
Again it’s a roundabout method , We will have added 14 days (2 weeks) to date column using simple addition operator (+) in postgresql and new column named new_date is being created as shown below.
SELECT *, birthdaytime::date + 14 as new_date from student_detail1
Output:
