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32 lines
1.2 KiB
Markdown
32 lines
1.2 KiB
Markdown
# Doing Date Math
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MySQL has an array of functions for interacting with `date` and `datetime`
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values. If you'd like to do math with a date to compute a date in the future
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or the past, you can use the
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[`DATE_ADD()`](https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-add)
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and
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[`DATE_SUB()`](https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-sub)
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functions.
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```mysql
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mysql> select now() Now, date_add(now(), interval 10 minute) '10 Minutes Later';
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+---------------------+---------------------+
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| Now | 10 Minutes Later |
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+---------------------+---------------------+
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| 2018-10-18 15:53:29 | 2018-10-18 16:03:29 |
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+---------------------+---------------------+
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mysql> select now() Now, date_sub(now(), interval 9 day) '9 Days Earlier';
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+---------------------+---------------------+
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| Now | 9 Days Earlier |
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+---------------------+---------------------+
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| 2018-10-18 15:54:01 | 2018-10-09 15:54:01 |
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+---------------------+---------------------+
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```
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There are equivalent `ADDDATE()` and `SUBDATE()` functions if you prefer.
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Check out [the
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docs](https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html)
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for more details.
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