MySQL各类时间取数函数

一、取一个月以前的时间：

1）mysql> select date_sub(curdate(), interval 1 month);  #当前日期一个月以前的日期

+---------------------------------------+
| date_sub(curdate(), interval 1 month) |
+---------------------------------------+
| 2017-03-28                            |
+---------------------------------------+

2）mysql> select date_sub(now(), interval 1 month);  #当前日期一个月以前的时间

+-----------------------------------+
| date_sub(now(), interval 1 month) |
+-----------------------------------+
| 2017-03-28 16:00:04               |
+-----------------------------------+

 

二、指定获取时间格式：

1）mysql> select date_format(date_sub(now(), interval 1 month), '%y-%m-%d');  #当前日期一个月以前是多少年月日

+------------------------------------------------------------+
| date_format(date_sub(now(), interval 1 month), '%y-%m-%d') |
+------------------------------------------------------------+
| 17-03-28                                                   |
+------------------------------------------------------------+

2）mysql> select date_format(date_sub(now(), interval 1 month), '%Y-%M-%D');  #当前日期一个月以前是多少年月日

+------------------------------------------------------------+
| date_format(date_sub(now(), interval 1 month), '%Y-%M-%D') |
+------------------------------------------------------------+
| 2017-March-28th                                            |
+------------------------------------------------------------+

3）mysql> select date_format(date_sub(now(), interval 1 month), '%y-%m');   # 当前日期一个月以前是多少年月

+---------------------------------------------------------+
| date_format(date_sub(now(), interval 1 month), '%y-%m') |
+---------------------------------------------------------+
| 17-03                                                   |
+---------------------------------------------------------+

 

三、日期加减

1）mysql> select interval 1 month + '2017-04-28';  # 某一日期1个月以后的日期是多少

+---------------------------------+
| interval 1 month + '2017-04-28' |
+---------------------------------+
| 2017-05-28                      |
+---------------------------------+

2）mysql> select '2017-04-28' + interval 10 day;  # 某一日期10天以后的日期是多少

+--------------------------------+
| '2017-04-28' + interval 10 day |
+--------------------------------+
| 2017-05-08                     |
+--------------------------------+

3）mysql> select '2017-04-28' - interval 10 day;  # 某一日期10天以前的日期是多少

+--------------------------------+
| '2017-04-28' - interval 10 day |
+--------------------------------+
| 2017-04-18                     |
+--------------------------------+

 

四、时间格式修改

1）mysql> select date_format(now(), '%W %M %Y');  #时间格式修改成星期 月份 年份格式

+--------------------------------+
| date_format(now(), '%W %M %Y') |
+--------------------------------+
| Friday April 2017              |
+--------------------------------+

2）mysql> select date_format(now(), '%H:%i:%s');  #24小时制时间显示

+--------------------------------+
| date_format(now(), '%H:%i:%s') |
+--------------------------------+
| 16:22:32                       |
+--------------------------------+

3）mysql> select date_format(now(), '%h:%i:%s');  #12小时制时间显示

+--------------------------------+ | date_format(now(), '%h:%i:%s') | +--------------------------------+ | 04:23:05                       | +--------------------------------+