将英国日期转换为UTC

Question

I have a table called pm_msg with a time column and the following values:

07-02-2013 18:11:00
27-01-2013 16:02:44
28-01-2013 10:30:26
30-01-2013 13:30:06

I would like to convert them to Unix timestamp while running an PDO SQL query. This is what I've done so far, but it seems to return an error. How should I go about doing it?

$sql = "SELECT * from pm_msg ORDER BY (strtotime(time)) ASC;";

Answer 1

strtotime does not exist in MySQL, you want the UNIX_TIMESTAMP function:

$sql = "SELECT * from pm_msg ORDER BY (UNIX_TIMESTAMP(time)) ASC;";

But - you don't need to convert it to a UNIX timestamp just to sort it. Sorting works correctly on dates? Maybe you intend to add the UNIX_TIMESTAMP to the SELECT portion?

Answer 2

UTC is more or less the same as GMT - does not take into account of DST.

So in spring and autumn you need to take that into account.

But to convert a date/time into unixtime using SQL see STR_TO_DATE or UNIXTIMESTAMP

Answer 3

如果您现在正在使用类似varchar的方法 ，将时间列设置为datetime会更容易。