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MySQL - Changing year of dates from 2020 to 2011?
You can change year of dates from 2020 to 2011 using SUBDATE() with INTERVAL of 9 year because there is a difference of 9 years between 2020 to 2011.
The syntax is as follows:
UPDATE yourTableName SET yourDateColumnName=SUBDATE(yourDateColumnName,INTERVAL 9 YEAR);
To understand the above syntax, let us create a table. The query to create a table is as follows:
mysql> create table ChangeYearFrom2020To2011 -> ( -> Id int NOT NULL AUTO_INCREMENT, -> ExpiryDate date, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.67 sec)
Insert some records in the table using insert command. The query to insert record is as follows:
mysql> insert into ChangeYearFrom2020To2011(ExpiryDate) values('2020-09-12');
Query OK, 1 row affected (0.19 sec)
mysql> insert into ChangeYearFrom2020To2011(ExpiryDate) values('2020-12-21');
Query OK, 1 row affected (0.17 sec)
mysql> insert into ChangeYearFrom2020To2011(ExpiryDate) values('2020-01-29');
Query OK, 1 row affected (0.12 sec)
mysql> insert into ChangeYearFrom2020To2011(ExpiryDate) values('2020-06-30');
Query OK, 1 row affected (0.19 sec)
mysql> insert into ChangeYearFrom2020To2011(ExpiryDate) values('2020-12-31');
Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement. The query is as follows:
mysql> select *from ChangeYearFrom2020To2011;
The following is the output:
+----+------------+ | Id | ExpiryDate | +----+------------+ | 1 | 2020-09-12 | | 2 | 2020-12-21 | | 3 | 2020-01-29 | | 4 | 2020-06-30 | | 5 | 2020-12-31 | +----+------------+ 5 rows in set (0.00 sec)
Here is the query to change only year from 2020 to 2011:
mysql> update ChangeYearFrom2020To2011 -> set ExpiryDate=subdate(ExpiryDate,interval 9 year); Query OK, 5 rows affected (0.20 sec) Rows matched: 5 Changed: 5 Warnings: 0
We will now check all the records of the table once again. The query is as follows:
mysql> select *from ChangeYearFrom2020To2011;
The following is the output:
+----+------------+ | Id | ExpiryDate | +----+------------+ | 1 | 2011-09-12 | | 2 | 2011-12-21 | | 3 | 2011-01-29 | | 4 | 2011-06-30 | | 5 | 2011-12-31 | +----+------------+ 5 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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