In order to add months 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 months to date column in PostgreSQL table.
Add months to date in PostgreSQL using INTERVAL data type:
We will be Using the INTERVAL data type to add months to date in PostgreSQL. When we add months to date using INTERVAL datatype the output will be in datetime(timestamp) format. In below example, we have added 3 months to date using Interval data type.
Example 1:
SELECT '2024-02-24'::date + INTERVAL '3 Months' as new_date
Output:
Add Months to date in PostgreSQL using make_interval() function:
We will be Using the make_interval() function to add months to datetime in PostgreSQL. When we add months to date using the make_interval() function, the output will be in datetime(timestamp) format. In below example, we have added 3 months to date
Example 1:
SELECT '2024-02-24'::date + make_interval(months => 3) as new_date
Output:
Add months 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 months to date in PostgreSQL. We have added 90 days (which is 3 months) to date in below example.
Example 1:
SELECT '2024-02-24'::date + 90 as new_date
Output:
Add months 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 months to datetime column in postgresql table.
student_detail1:
We have added 3 Months to datetime column using INTERVAL datatype in postgresql and new column named new_date is being created as shown below.
select *, birthdaytime::timestamp + INTERVAL '3 MONTHS' as new_date from student_detail1
Output:
Add Months to datetime column in PostgreSQL table using make_interval() function:
We will have added 3 months 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(months => 3) as new_date from student_detail1
Output:
Add Months to datetime column in PostgreSQL table using Additional (+) operator (roundabout way) :
Again it’s a roundabout method , We will have added 92 days (3 months) to datetime column using simple addition operator (+) in postgresql and new column named new_date is being created as shown below.
SELECT *, birthdaytime::date + 92 as new_date from student_detail1
Output:
