Add times with SUM. : DATETIME « Date Time « SQL / MySQL

1. SQL / MySQL
2. Date Time
3. DATETIME

Add times with SUM.

     
mysql>
MySQL attempts to interpret results like 10:45:00 as ordinary numbers:
mysql>
mysql> CREATE TABLE mytable (
    ->     id INT AUTO_INCREMENT,
    ->     begintime DATETIME,
    ->     endtime DATETIME,
    ->     PRIMARY KEY (id)
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql> INSERT INTO mytable (begintime, endtime) VALUES
    ->         ('2005-03-27 7:15', '2005-03-27 18:00'),
    ->         ('2005-03-28 8:00', '2005-03-28 18:00'),
    ->         ('2005-03-29 7:30', '2005-03-29 16:50'),
    ->         ('2005-03-30 7:00', '2005-03-30 17:15');
Query OK, 4 rows affected (0.00 sec)
Records: 4  Duplicates: 0  Warnings: 0

mysql> SELECT SUM(TIMEDIFF(endtime, begintime)) AS sumtime FROM mytable;
+---------------+
| sumtime       |
+---------------+
| 398000.000000 |
+---------------+
1 row in set (0.00 sec)

mysql>
mysql>
mysql> drop table mytable;
Query OK, 0 rows affected (0.00 sec)

   
    
    
    
    
  

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