mysql bigint类型和datetime类型的转换

转自：http://lbyzx123.iteye.com/blog/1073467

1. 1、bigint类型转换为datetime类型
2. -- 假设 1164691264437 是 Java 里的“日期时间”：即：自1970-01-01 00:00:00以来的毫秒数
   
3. /*
   
4. getTime
   
5. public long getTime()Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this Date object. 
   
6. 
   
7. Returns:
   
8. the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this date.
   
9. */
   
10. mysql> select from_unixtime(1164691264437/1000);
    
11. +-----------------------------------+
    
12. | from_unixtime(1164691264437/1000) |
    
13. +-----------------------------------+
    
14. | 2006-11-28 13:21:04               |
    
15. +-----------------------------------+

         2、datetime类型转换为bigint类型

1. -- 假设 "2011-05-31 23:59:59" 是 Java 里的“日期时间”：即：自1970-01-01 00:00:00以来的毫秒数
   
3. 
   
4. mysql> select UNIX_TIMESTAMP('2011-05-31 23:59:59');
   
5. +-----------------------------------+
   
6. | from_unixtime(1306857599/1000) |
   
7. +-----------------------------------+      |