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MySQL query to update only month in date?
To update only month in date, use MONTH(). Let us first create a table −
mysql> create table DemoTable861(AdmissionDate date); Query OK, 0 rows affected (1.22 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable861 values('2019-01-21');
Query OK, 1 row affected (0.31 sec)
mysql> insert into DemoTable861 values('2018-01-01');
Query OK, 1 row affected (0.49 sec)
mysql> insert into DemoTable861 values('2016-01-02');
Query OK, 1 row affected (1.27 sec)
mysql> insert into DemoTable861 values('2018-01-14');
Query OK, 1 row affected (0.47 sec)Display all records from the table using select statement −
mysql> select *from DemoTable861;
This will produce the following output −
+---------------+ | AdmissionDate | +---------------+ | 2019-01-21 | | 2018-01-01 | | 2016-01-02 | | 2018-01-14 | +---------------+ 4 rows in set (0.00 sec)
Following is the query to update only month −
mysql> update DemoTable861 set AdmissionDate=date_add(AdmissionDate,Interval -1 month) where month(AdmissionDate)=01; Query OK, 4 rows affected (0.42 sec) Rows matched : 4 Changed : 4 Warnings : 0
Let us check the table records once again −
mysql> select *from DemoTable861;
This will produce the following output −
+---------------+ | AdmissionDate | +---------------+ | 2018-12-21 | | 2017-12-01 | | 2015-12-02 | | 2017-12-14 | +---------------+ 4 rows in set (0.00 sec)
Updated on: 03-Sep-2019
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