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MySQL DATE_ADD() to increment a date based on the value in another column?
Let us first create a table with one of the columns as DueDate and another one “RepeatTime, which displays how many times, let’s say a user was reminded to submit the payment −
mysql> create table DemoTable -> ( -> DueDate date, -> RepeatTime int -> ); Query OK, 0 rows affected (0.57 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('2019-01-23',3);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable values('2019-06-22',6);
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('2019-03-28',2);
Query OK, 1 row affected (0.25 sec)
mysql> insert into DemoTable values('2017-07-25',6);
Query OK, 1 row affected (0.15 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
This will produce the following output −
+------------+------------+ | DueDate | RepeatTime | +------------+------------+ | 2019-01-23 | 3 | | 2019-06-22 | 6 | | 2019-03-28 | 2 | | 2017-07-25 | 6 | +------------+------------+ 4 rows in set (0.00 sec)
Here is the query that increments date based in the values in another column −
mysql> update DemoTable set DueDate=date_add(DueDate,interval RepeatTime MONTH) where RepeatTime!=6; Query OK, 2 rows affected (0.25 sec) Rows matched: 2 Changed: 2 Warnings: 0
Let us check table records once again −
mysql> select *from DemoTable;
Output
This will produce the following output −
+------------+------------+ | DueDate | RepeatTime | +------------+------------+ | 2019-04-23 | 3 | | 2019-06-22 | 6 | | 2019-05-28 | 2 | | 2017-07-25 | 6 | +------------+------------+ 4 rows in set (0.00 sec)
Updated on: 30-Jun-2020
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