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How to update date of datetime field with MySQL?
Update date of datetime field with the help of arithmetic operator minus(-).
The syntax is as follows
update yourTableName set yourDateTimeColumnName=yourDateTimeColumnName - interval yourValue day where date(yourDateTimeColumnName)=’yourDateValue’;
To understand the above syntax, let us create a table. The query to create a table is as follows
mysql> create table updateDateDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ArrivalDate datetime -> ); Query OK, 0 rows affected (0.66 sec)
Insert some records in the table using insert command.
The query is as follows
mysql> insert into updateDateDemo(ArrivalDate) values('2011-01-13');
Query OK, 1 row affected (0.19 sec)
mysql> insert into updateDateDemo(ArrivalDate) values('2013-04-21');
Query OK, 1 row affected (0.11 sec)
mysql> insert into updateDateDemo(ArrivalDate) values('2016-12-22');
Query OK, 1 row affected (0.14 sec)
mysql> insert into updateDateDemo(ArrivalDate) values('2017-02-25');
Query OK, 1 row affected (0.27 sec)
mysql> insert into updateDateDemo(ArrivalDate) values('2018-08-19');
Query OK, 1 row affected (0.17 sec)
mysql> insert into updateDateDemo(ArrivalDate) values('2019-02-27');
Query OK, 1 row affected (0.24 sec)
Display all records from the table using select statement.
The query is as follows
mysql> select *from updateDateDemo;
The following is the output
+----+---------------------+ | Id | ArrivalDate | +----+---------------------+ | 1 | 2011-01-13 00:00:00 | | 2 | 2013-04-21 00:00:00 | | 3 | 2016-12-22 00:00:00 | | 4 | 2017-02-25 00:00:00 | | 5 | 2018-08-19 00:00:00 | | 6 | 2019-02-27 00:00:00 | +----+---------------------+ 6 rows in set (0.00 sec)
Here is the query to update date of datetime field
mysql> update updateDateDemo -> set ArrivalDate=ArrivalDate-interval 7 day -> where date(ArrivalDate)='2019-02-27'; Query OK, 1 row affected (0.13 sec) Rows matched: 1 Changed: 1 Warnings: 0
Now check the updated records from the table
mysql> select *from updateDateDemo;
The following is the output
+----+---------------------+ | Id | ArrivalDate | +----+---------------------+ | 1 | 2011-01-13 00:00:00 | | 2 | 2013-04-21 00:00:00 | | 3 | 2016-12-22 00:00:00 | | 4 | 2017-02-25 00:00:00 | | 5 | 2018-08-19 00:00:00 | | 6 | 2019-02-20 00:00:00 | +----+---------------------+ 6 rows in set (0.00 sec)
Updated on: 2019-07-30T22:30:25+05:30
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