From: Pintér Tibor
Date: February 24 2011 5:06pm
Subject: Re: Get date from unix_timestamp only up to the hour
List-Archive: http://lists.mysql.com/mysql/224499
Message-Id: <4D66901F.90109@tibyke.hu>
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On 02/24/2011 05:41 PM, Bryan Cantwell wrote:
> How would I go about modifying a unix timestamp to actually represent
> the 'top of the hour' that it represents?
> For instance:
> 1296158500 = 1/27/2011 2:01:40 PM
> That is in the 2:00 pm hour, how can I find that out and modify it to
> 1296158400 which = 1/27/2011 2:00:00 PM?

something like this:

mysql> set @now:=now(), @foo:=unix_timestamp(); select @now, @foo, @foo
- minute(@now) * 60 - second(@now) as hour_unix, from_unixtime(@foo -
minute(@now) * 60 - second(@now));
Query OK, 0 rows affected (0.00 sec)

+---------------------+------------+------------+--------------------------------------------------------+
| @now                | @foo       | hour_unix  | from_unixtime(@foo -
minute(@now) * 60 - second(@now)) |
+---------------------+------------+------------+--------------------------------------------------------+
| 2011-02-24 18:06:24 | 1298567184 | 1298566800 | 2011-02-24 18:00:00
                                 |
+---------------------+------------+------------+--------------------------------------------------------+
1 row in set (0.00 sec)



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