Mysql totale temps écoulé depuis deux dates

Question

Si j'ai deux lignes

id created   start   stop 
1 28-01-2011 23:00 28-01-2011 23:00 28-01-2011 23:01 
2 28-01-2011 23:10 28-01-2011 23:10 28-01-2011 23:11 

Que puis-je exécuter la requête pour obtenir le temps total écoulé pour une seule date, donc pour 28-01-2011 le temps total était de 2 minutes .

Est-ce possible?

Answer 1

bien une option est simple:

select sum(unix_timestamp(stop) - 
    unix_timestamp(start))/60 from table 
    where date(created) = '28-01-2011'; 

mysql> select now(), date_add(now(), interval 10 minute); 
+---------------------+-------------------------------------+ 
| now()    | date_add(now(), interval 10 minute) | 
+---------------------+-------------------------------------+ 
| 2011-10-04 13:29:56 | 2011-10-04 13:39:56     | 
+---------------------+-------------------------------------+ 
1 row in set (0.01 sec) 

mysql> select sum(unix_timestamp(now()) - 
      unix_timestamp(date_add(now(), interval 10 minute))); 
+----------------------------------------------------------------------------------+ 
| sum(unix_timestamp(now()) - unix_timestamp(date_add(now(), interval 10 minute))) | 
+----------------------------------------------------------------------------------+ 
|                    -600 | 
+----------------------------------------------------------------------------------+ 
1 row in set (0.00 sec) 


mysql> select sum(unix_timestamp(now()) - 
      unix_timestamp(date_add(now(), interval 10 minute)))/60 ; 
+---------------------------------------------------------------------------------------+ 
| sum(unix_timestamp(now()) - unix_timestamp(date_add(now(), interval 10 minute)))/60 | 
+---------------------------------------------------------------------------------------+ 
|                    -10.0000 | 
+---------------------------------------------------------------------------------------+ 
1 row in set (0.00 sec)