MySQL commonly used date and time functions-Mysql Tutorial-php.cn

MySQL commonly used date and time functions

黄舟

Release： 2017-02-27 13:26:18

Original

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The first three are relatively simple and will not be explained in detail

mysql> SELECT NOW();
+---------------------+
| NOW()               |
+---------------------+
| 2016-09-08 16:12:01 |
+---------------------+
1 row in set (0.04 sec)

mysql> SELECT CURDATE();
+------------+
| CURDATE()  |
+------------+
| 2016-09-08 |
+------------+
1 row in set (0.00 sec)

mysql> SELECT CURTIME();
+-----------+
| CURTIME() |
+-----------+
| 16:12:22  |
+-----------+
1 row in set (0.00 sec)

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DATE_ADD() can add and subtract time

The following units are common year, month and day. For example,

mysql> SELECT DATE_ADD(&#39;2016-3-12&#39;,INTERVAL 365 DAY);
+----------------------------------------+
| DATE_ADD(&#39;2016-3-12&#39;,INTERVAL 365 DAY) |
+----------------------------------------+
| 2017-03-12                             |
+----------------------------------------+
1 row in set (0.00 sec)

mysql> SELECT DATE_ADD(&#39;2016-3-12&#39;,INTERVAL -365 DAY);
+-----------------------------------------+
| DATE_ADD(&#39;2016-3-12&#39;,INTERVAL -365 DAY) |
+-----------------------------------------+
| 2015-03-13                              |
+-----------------------------------------+
1 row in set (0.00 sec)

mysql> SELECT DATE_ADD(&#39;2016-3-12&#39;,INTERVAL 1 YEAR);
+---------------------------------------+
| DATE_ADD(&#39;2016-3-12&#39;,INTERVAL 1 YEAR) |
+---------------------------------------+
| 2017-03-12                            |
+---------------------------------------+
1 row in set (0.00 sec)

mysql> SELECT DATE_ADD(&#39;2016-3-12&#39;,INTERVAL 3 WEEK);
+---------------------------------------+
| DATE_ADD(&#39;2016-3-12&#39;,INTERVAL 3 WEEK) |
+---------------------------------------+
| 2016-04-02                            |
+---------------------------------------+
1 row in set (0.00 sec)

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DATEDIFF() can get the difference between the two times:

mysql> SELECT DATEDIFF(&#39;2013-3-12&#39;,&#39;2014-3-12&#39;);
+-----------------------------------+
| DATEDIFF(&#39;2013-3-12&#39;,&#39;2014-3-12&#39;) |
+-----------------------------------+
|                              -365 |
+-----------------------------------+
1 row in set (0.03 sec)

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DATE_FORMAT( )Date formatting

mysql> SELECT DATE_FORMAT(&#39;2014-3-2&#39;,&#39;%m/%d/%Y&#39;);
+------------------------------------+
| DATE_FORMAT(&#39;2014-3-2&#39;,&#39;%m/%d/%Y&#39;) |
+------------------------------------+
| 03/02/2014                         |
+------------------------------------+
1 row in set (0.00 sec)

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The formats that can be used are:

##%DDay of the month with English prefix%dDay of the month, value (00-31)%eDay of the month, value (0-31)%fMicroseconds%Hhour(00-23)%hhour(01-12)%IHours (01-12)%iMinutes, value (00-59)%j Day of year (001-366)%k Hour (0- 23)%l hours (1-12)%Mmonth name %mMonth, value (00-12)%pAM or PM%rTime, 12-hour (hh:mm:ss AM or PM)%S Seconds(00-59)##%uweek(00-53) Monday is the first day of the week%Vweek(01-53) Sunday is the first day of the week Day, with %X use %v Week (01-53) Monday is the first day of the week, with %x use %WName of the week%wDay of the week (0=Sunday, 6=Saturday) %X year, where Sunday is the first day of the week, 4 digits, use with %V %x year, where Monday is the first day of the week, 4 digits, and %v uses %Y year, 4 Bit %y year, 2 bits

Format	Description
%a	Abbreviated week name
%b	Abbreviated month name
%c	Month, numerical value
















%s	Seconds (00-59)
%T	Time, 24-hour (hh:mm: ss)
%U	week(00-53) Sunday is the first day of the week

##There are some remaining date and time functions, which are rarely used and will not be listed here.

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