sql：mysql：函數：TIMESTAMPDIFF函數實現TimeStamp字段相減，求得時間差

 函數內指定是minute，則最終結果value值的單位是分鍾，如果函數內指定為hours，則最終結果value值單位為小時。

   
   
  
  
          
 
           
 
            
 
             
 
            
 
            
 
             

               //UPLOAD_TIME 減去 CREATE_DTTM 求得時間差，以分鍾數計時 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              select 
              avg( 
              TIMESTAMPDIFF( 
              MINUTE,CREATE_DTTM,UPLOAD_TIME)) 
              value, 
              LEFT(CREATE_DTTM, 
              10) 
              time 
              from 表名 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              WHERE 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               CREATE_DTTM >= 
              '2018-01-21' 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              AND CREATE_DTTM <= 
              DATE_ADD( 
              '2019-02-19', 
              INTERVAL 
              1 
              DAY) 
              and UPLOAD_TIME 
              is 
              not 
              null 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
              group 
              by 
              LEFT(CREATE_DTTM, 
              10) 
             
 
            
 
          
  
  
 
 
         

參考：https://blog.csdn.net/yiifaa/article/details/78611079

https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_microsecond

 

   
   
  
  
          
 
           
 
            
 
             
 
            
 
            
 
             

               mysql> 
              SELECT TIMESTAMPDIFF(MONTH,'2003-02-01','2003-05-01'); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               -> 
              3 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               mysql> 
              SELECT TIMESTAMPDIFF(YEAR,'2002-05-01','2001-01-01'); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               -> - 
              1 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               mysql> 
              SELECT TIMESTAMPDIFF(MINUTE,'2003-02-01','2003-05-01 12:05:55'); 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               -> 
              128885 
             
 
            
 
          
  
  
 
 
         

原文地址：https://blog.csdn.net/weixin_38750084/article/details/88118039