mysql 获取系统时间
2014-04-02 15:42
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mysql> select now();
+---------------------+
| now() |
+---------------------+
| 2011-06-11 12:00:54 |
+---------------------+
1 row in set (0.00 sec)
mysql> select sysdate();
+---------------------+
| sysdate() |
+---------------------+
| 2011-06-11 12:00:54 |
+---------------------+
1 row in set (0.00 sec)
mysql> select curdate();
+------------+
| curdate() |
+------------+
| 2011-06-11 |
+------------+
1 row in set (0.00 sec)
mysql> select current_date;
+--------------+
| current_date |
+--------------+
| 2011-06-11 |
+--------------+
1 row in set (0.00 sec)
mysql> select curtime();
+-----------+
| curtime() |
+-----------+
| 12:00:54 |
+-----------+
1 row in set (0.00 sec)
mysql> select current_time;
+--------------+
| current_time |
+--------------+
| 12:00:54 |
+--------------+
1 row in set (0.00 sec)
2. mysql (unix 时间戳、日期)转换函数:
unix_timestamp(),
unix_timestamp(date),
from_unixtime(unix_timestamp),
from_unixtime(unix_timestamp,format)
下面是示例:
select unix_timestamp(); -- 1218290027 ===得到当前时间的unix时间值
将具体时间来转换成timestamp
select unix_timestamp('2008-08-08'); -- 1218124800
select unix_timestamp('2008-08-08 12:30:00'); -- 1218169800
将timestamp来转换成具体时间
select from_unixtime(1218290027); -- '2008-08-09 21:53:47'
select from_unixtime(1218124800); -- '2008-08-08 00:00:00'
select from_unixtime(1218169800); -- '2008-08-08 12:30:00'
select from_unixtime(1218169800, '%y %d %m %h:%i:%s %x'); -- '2008 8th august 12:30:00 2008'
+---------------------+
| now() |
+---------------------+
| 2011-06-11 12:00:54 |
+---------------------+
1 row in set (0.00 sec)
mysql> select sysdate();
+---------------------+
| sysdate() |
+---------------------+
| 2011-06-11 12:00:54 |
+---------------------+
1 row in set (0.00 sec)
mysql> select curdate();
+------------+
| curdate() |
+------------+
| 2011-06-11 |
+------------+
1 row in set (0.00 sec)
mysql> select current_date;
+--------------+
| current_date |
+--------------+
| 2011-06-11 |
+--------------+
1 row in set (0.00 sec)
mysql> select curtime();
+-----------+
| curtime() |
+-----------+
| 12:00:54 |
+-----------+
1 row in set (0.00 sec)
mysql> select current_time;
+--------------+
| current_time |
+--------------+
| 12:00:54 |
+--------------+
1 row in set (0.00 sec)
2. mysql (unix 时间戳、日期)转换函数:
unix_timestamp(),
unix_timestamp(date),
from_unixtime(unix_timestamp),
from_unixtime(unix_timestamp,format)
下面是示例:
select unix_timestamp(); -- 1218290027 ===得到当前时间的unix时间值
将具体时间来转换成timestamp
select unix_timestamp('2008-08-08'); -- 1218124800
select unix_timestamp('2008-08-08 12:30:00'); -- 1218169800
将timestamp来转换成具体时间
select from_unixtime(1218290027); -- '2008-08-09 21:53:47'
select from_unixtime(1218124800); -- '2008-08-08 00:00:00'
select from_unixtime(1218169800); -- '2008-08-08 12:30:00'
select from_unixtime(1218169800, '%y %d %m %h:%i:%s %x'); -- '2008 8th august 12:30:00 2008'
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