mysql 查询当前时间

第一种方法:select current_date;

mysql> select current_date as Systemtime;
+------------+
| Systemtime |
+------------+
| 2009-07-29 |
+------------+

第二种方法:select now()

mysql> select now() as Systemtime;
+---------------------+
| Systemtime          |
+---------------------+
| 2009-07-29 19:06:07 |
+---------------------+

第三种方法:select sysdate()

mysql> select sysdate() as Systemtime;
+---------------------+
| Systemtime          |
+---------------------+
| 2009-07-29 19:06:45 |
+---------------------+