I have a time stamp of the form "17:16:28 Sep 13, 2011 PDT" in a MySQL database. The type of the field in the database is VARCHAR. I would like to convert this VARCHAR to a field of type TIMESTAMP in MySQL.
I tried a few solutions suggested elsewhere on this site, such as using a string_to_time function, but these solutions all start from a different type of timestamp.
How do I convert the VARCHAR timestamp mentioned above to a TIMESTAMP recognised by MySQL, in such a way that I can sort my data by date?
You can do this by using STR_TO_DATE function in MySQL, try this:
SELECT STR_TO_DATE("17:16:28 Sep 13, 2011 PDT", '%H:%i:%s %b %d, %Y PDT');
EDIT:
SELECT STR_TO_DATE(field_name, '%H:%i:%s %b %d, %Y PDT') AS new_time
FROM table_name;
Use str_to_date with formatting:
select unix_timestamp(str_to_date("17:16:28 Sep 13, 2011 PDT","%T %b %d, %Y PDT"));
If the day part (e.g.: 13) is not represented as 01, 02..etc. but 1, 2, 3 when it's only one digit, change the %d to %e
Be careful because the timezone will not be recognized, it's only a string literal for the formatting! If you have different timezones for different records you should use the convert_tz() function to get the proper timestamp.
Related
I have date on MySQL table on the format of Fri Oct 30 09:50:37 2015, when I try to format using DATE_FORMAT(delv_time,'%Y-%m-%d') it return null.
That's not as date as far as MySQL is concerned. That's a string. You need to convert it into a date using STR_TO_DATE(). Then you can use DATE_FORMAT() to get only the date portion of the datetime.
DATE_FORMAT(STR_TO_DATE(delv_time,'%a %b %d %T %Y'),'%Y-%m-%d')
select COUNT(DISTINCT devices) AS "Devices" from measure_tab where
measure_tab.time >= 1375243200 and
measure_tab.time < 1375315200;
The output of the above sql query gives a table with a column named "Devices" with number of devices. I want the time which is one of the attributes of measure_tab should also get displayed in another column of the output table with the UNIX TIME which is 1375243200 in this query converted into the SQL datetime format which is Thu Aug 1 00:00:00 UTC 2013.
Can someone help me out?
Thanks
You can use function as below:
select FROM_UNIXTIME(UNIX_TIMESTAMP(),'%a %b %d %H:%i:%s UTC %Y');
output will be:
'Wed Feb 05 05:36:16 UTC 2014'
In your query
select COUNT(DISTINCT devices) AS "Devices",
FROM_UNIXTIME(measure_tab.time,'%a %b %d %H:%i:%s UTC %Y') as d from measure_tab where
measure_tab.time >= 1375243200 and
measure_tab.time < 1375315200;
For more info you can check documentation: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_from-unixtime
You can see sql fiddle:http://sqlfiddle.com/#!2/a2581/20357
In Mysql you can use from_unixtime() function to convert unix timestamp to Date:
select COUNT(DISTINCT devices) AS "Devices" from measure_tab where
measure_tab.time >= from_unixtime(1375243200) and
measure_tab.time < from_unixtime(1375315200);
you could use FROM_UNIXTIME inside DATE_FORMAT, but luckily,
FROM_UNIXTIME also accepts a format string, so you could just use it
by itself
Like this
SELECT FROM_UNIXTIME(UNIX_TIMESTAMP(),'%Y %D %M %h:%i:%s %x')
DATE_FORMAT(NOW(),'%b %d %Y %h:%i %p')
DATE_FORMAT(NOW(),'%m-%d-%Y')
DATE_FORMAT(NOW(),'%d %b %y')
DATE_FORMAT(NOW(),'%d %b %Y %T:%f')
As detailed in the other answers, FROM_UNIXTIME is the function you are looking for. Please be aware that this implicitly takes into account the local time zone setting on the machine running MySQL.
There's lots of useful information here:
Should MySQL have its timezone set to UTC?
if you need to find out how to check/set the time zone.
THE SITUATION
I pull timestamps formatted in RFC 2822 (Sat, 01 Dec 2012 05:49:45 +0000) and store them in a VARCHAR field in MYSQL. I have a start_date and end_date.
THE GOAL
Search BETWEEN two dates (like start_date BETWEEN '2012-11-01' AND '2012-12-01')
THE CONDITIONS
I want to do this with pure SQL and not do post processing in PHP
THE ACCEPTABLE COMPROMISE
I don't want to, but I will convert and store them as DATETIME by using PHP if needed.
Can anyone help me accomplish my goal (listed above).
Rick
You could convert your string dates do datetime using str_to_date:
select str_to_date('Sat, 01 Dec 2012 05:49:45 +0000','%a, %d %b %Y %T')
If you need to convert also timezone, try this:
set #datestring='Sat, 01 Dec 2012 05:49:45 +0000';
select
CONVERT_TZ(
str_to_date(#datestring,'%a, %d %b %Y %T'),
concat(mid(#datestring, 27, 3), ':', mid(#datestring, 30, 2)),
'+00:00'
)
Store them as a native DATETIME. This is the only sane approach.
Why are you so opposed to using the proper tool for the job?
Storing timestamps as a string is poor use of the database features. Since they were all the same format, they could have easily been converted to a datetime on input.
How do I convert the following format to unix timestamp?
Apr 15 2012 12:00AM
The format I get from DB seems to have AM at the end.
I've tried using the following but it did not work:
CONVERT(DATETIME, Sales.SalesDate, 103) AS DTSALESDATE,
CONVERT(TIMESTAMP, Sales.SalesDate, 103) AS TSSALESDATE
where Sales.SalesDate value is Apr 15 2012 12:00AM
Here's an example of how to convert DATETIME to UNIX timestamp:
SELECT UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p'))
Here's an example of how to change date format:
SELECT FROM_UNIXTIME(UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p')),'%m-%d-%Y %h:%i:%p')
Documentation: UNIX_TIMESTAMP, FROM_UNIXTIME
You will certainly have to use both STR_TO_DATE to convert your date to a MySQL standard date format, and UNIX_TIMESTAMP to get the timestamp from it.
Given the format of your date, something like
UNIX_TIMESTAMP(STR_TO_DATE(Sales.SalesDate, '%M %e %Y %h:%i%p'))
Will gives you a valid timestamp. Look the STR_TO_DATE documentation to have more information on the format string.
If you want to create a timestamp as returned by java's Date.getTime() you should multiply by 1000.
SELECT UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p'))*1000
Now for a more standard date format use:
SELECT UNIX_TIMESTAMP(STR_TO_DATE('2022-12-14 20:58:00', '%Y-%m-%d %H:%i:%s'))*1000
From http://www.epochconverter.com/
SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())
My bad, SELECT unix_timestamp(time) Time format: YYYY-MM-DD HH:MM:SS or YYMMDD or YYYYMMDD. More on using timestamps with MySQL:
http://www.epochconverter.com/programming/mysql-from-unixtime.php
In mysql database I store date column as unix-timestamp format (for example:1264105904). I want to convert this date to datetime like "Oct 11, 2011 6:25 am PDT" in select statement. How can I achieve this?
select date_format(from_unixtime(1264105904),'%b %d, %Y %l:%i %p PDT');
should do what you want