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How to subtract 3 hours from a datetime in MySQL?
Subtract 3 hours from DateTime in MySQL, using any of the following ways. The first approach is as follows −
Case 1 − Using DATE_ADD()
select date_add(yourColumnName,interval -3 hours) from yourTableName;
Case 2 − Using DATE_SUB()
select date_sub(yourColumnName,interval 3 hours) from yourTableName;
Firstly, use now() to get the current date-time −
mysql> select now();
The following is the output −
+---------------------+ | now() | +---------------------+ | 2018-11-30 10:13:23 | +---------------------+ 1 row in set (0.00 sec)
DATE_ADD
The query to subtract 3 hours from DateTime is as follows. With date_add, we have set a negative date −
mysql> select date_add(now(),interval -3 hour);
The following is the output −
+----------------------------------+ | date_add(now(),interval -3 hour) | +----------------------------------+ | 2018-11-30 07:13:28 | +----------------------------------+ 1 row in set (0.00 sec)
DATE_SUB
Get the current date and time −
mysql> select now();
The output −
+---------------------+ | now() | +---------------------+ | 2018-11-30 10:14:12 | +---------------------+ 1 row in set (0.00 sec)
Implement the second method using date_sub(). The query is as follows −
mysql> select date_sub(now(),interval 3 hour);
The following output displays the date subtracting 3 hours −
+---------------------------------+ | date_sub(now(),interval 3 hour) | +---------------------------------+ | 2018-11-30 07:14:25 | +---------------------------------+ 1 row in set (0.00 sec)
Updated on: 29-Jun-2020
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