In order to subtract year from current date in PostgreSQL we will using three approach one by using the – operator, other by using make_interval() and other using the INTERVAL data type. Here are examples of these three approaches. Also, we will look at how to Subtract year from current datetime column in PostgreSQL table.
Subtract years from current datetime in PostgreSQL using INTERVAL data type:
We will be Using the INTERVAL data type to subtract years from current date in PostgreSQL. When we subtract years from current date using INTERVAL datatype the output will be in datetime(timestamp) format. In below example, we have subtracted 2 years from current date using Interval data type.
Example 1:
SELECT CURRENT_DATE - INTERVAL '2 YEARS' as new_date
Output:
Subtract years from current datetime in PostgreSQL using make_interval() function:
We will be Using the make_interval() function to subtract years from current datetime in PostgreSQL. When we subtract years from current date using the make_interval() function, the output will be in datetime(timestamp) format. In below example, we have subtracted 2 years from current date
Example 1:
SELECT CURRENT_DATE::date - make_interval(years => 2) as new_date
Output:
Subtract years from current date in PostgreSQL (round about):
To Subtract years from current date in PostgreSQL we will using CURRENT_DATE keyword with subtraction (-) symbol. Which will subtract 730 days which is 2 years from current date as shown below.
Example 1:
SELECT CURRENT_DATE - 730 AS new_date;
Output:
Subtract years from current datetime column in PostgreSQL table using Interval datatype:
We will be using below fruits table for our example to depict on how to subtract years from current date column in PostgreSQL table.
fruits:
We have subtracted 2 YEARS from current datetime column using INTERVAL datatype in PostgreSQL and new column named new _date is being created as shown below.
select *,current_date, Current_date::timestamp - INTERVAL '2 YEARS' as new_date from fruits
Output:
Subtract years from current datetime column in PostgreSQL table using make_interval() function:
We have subtracted 2 years from current datetime column using make_interval() function in postgresql and new column named new_date is being created as shown below.
select *,current_date, Current_date::timestamp - make_interval(years => 2) as new_date from fruits
Output:
Subtract YEARS from current date column in PostgreSQL table using Subtraction (-) operator:
In this round about method We have subtracted 730 days from current date column using simple subtraction operator (-) in postgresql and new column named new_date is being created as shown below.
SELECT *,current_date, current_date- 730 as new_date from fruits
Output:
