Mysql中日期计算函数
1.curdate() 求当前的日期
mysql> select curdate();
+------------+
| curdate() |
+------------+
| 2008-03-11 |
+------------+
1 row in set (0.01 sec)
2.now() 求当前日期和时间
mysql> select now();
+---------------------+
| now() |
+---------------------+
| 2008-03-11 10:16:20 |
+---------------------+
1 row in set (0.00 sec)
3.year() 提取日期中的年
mysql> select year(curdate());
+-----------------+
| year(curdate()) |
+-----------------+
| 2008 |
+-----------------+
1 row in set (0.01 sec)
4.right() 提取日期的MM-DD或是DD
mysql> select right(curdate(),5);
+--------------------+
| right(curdate(),5) |
+--------------------+
| 03-11 |
+--------------------+
1 row in set (0.01 sec)
mysql> select right(curdate(),2);
+--------------------+
| right(curdate(),2) |
+--------------------+
| 11 |
+--------------------+
1 row in set (0.00 sec)
5.month() 提取日期中的月份
mysql> select month(curdate());
+------------------+
| month(curdate()) |
+------------------+
| 3 |
+------------------+
1 row in set (0.01 sec)
-------未完，待续
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