This does make his code fall under the limitations of unix timestamps.
In 30 years or so when we are all retired millionaires ;) some poor
intern is going to have to figure out why the hour diff calculation is
failing.
SGreen@stripped wrote:
>Gyurasits Zoltán <gyz@stripped> wrote on 07/27/2005 12:57:42 PM:
>
>
>
>> TIMESTAMP() is available as of MySQL 4.1.1.
>>
>>I can't use this version because replication working :(
>>
>>I use version 4.0.22
>>
>>----- Original Message -----
>>From: "Martijn Tonies" <m.tonies@stripped>
>>To: "Gyurasits Zoltán" <gyz@stripped>; <mysql@stripped>
>>Sent: Wednesday, July 27, 2005 6:31 PM
>>Subject: Re: Hour counts
>>
>>
>>
>>
>>>Hi,
>>>
>>>Check out the TIMEDIFF function.
>>>
>>>With regards,
>>>
>>>Martijn Tonies
>>>Database Workbench - tool for InterBase, Firebird, MySQL, Oracle & MS
>>>
>>>
>SQL
>
>
>>>Server
>>>Upscene Productions
>>>http://www.upscene.com
>>>Database development questions? Check the forum!
>>>http://www.databasedevelopmentforum.com
>>>
>>>I would like to calculate the hour counts from 2 'datetime'.
>>>Example: 2005-07-27 18:00 and 2005-07-27 19:30 => 1,5 hour
>>>
>>>I try this.... but not good!
>>>
>>>R1 : munkaido_end-munkaido_start /simple substract/
>>>R2 : ROUND(ROUND((end-start)/10000)+
>>>(((end-start)/1000-(ROUND((end-start)/10000)*10))/6),1) /good if is
>>>
>>>
>in
>
>
>>>one
>>>day/
>>>R3 : ROUND((end-start)/10000)-76 /-76 because from 14. to 15. I don't
>>>understand/
>>>
>>>
>>>start end R1 R2 R3
>>>07-14 15:00 07-14 17:30 23000 2.5 -74
>>>07-14 23:00 07-15 01:30 783000 78.5 2
>>>07-14 15:00 07-15 02:30 873000 87.5 11
>>>07-14 15:00 07-14 16:00 10000 1 -75
>>>
>>>Please help me... (exist a function for this situation?)
>>>
>>>
>>>Tnx!
>>>
>>>
>>>--
>>>MySQL General Mailing List
>>>For list archives: http://lists.mysql.com/mysql
>>>To unsubscribe: http://lists.mysql.com/mysql?unsub=1
>>>
>>>
>>>
>
>Then your next option is to convert your datetime values to "seconds since
>epoch" by using UNIX_TIMESTAMP() (see the same link everyone else has
>already given you for details).
>
>mysql>SELECT (unix_timestamp('2005-07-27 19:30:00') -
>unix_timestamp('2005-07-27 18:00:00'))/3600;
>+--------------------------------------------------------------------------------------+
>| (unix_timestamp('2005-07-27 19:30:00') - unix_timestamp('2005-07-27
>18:00:00'))/3600 |
>+--------------------------------------------------------------------------------------+
>| 1.50 |
>+--------------------------------------------------------------------------------------+
>1 row in set (0.00 sec)
>
>
>Shawn Green
>Database Administrator
>Unimin Corporation - Spruce Pine
>
>
>
>
>
