How to Convert UTC Date To Local time Zone in MySql Select Query

问题

I am using this Where Condition in One Of my query with MySql Database.My Problem is that i have one displaytime column in my table but that table column shows the data in UTC Time.and i want to convert that displaytime column in the Local Time Zone.so how can i provide this facility from query itself.

I have goggled the things and by that i knew that something like SELECT CONVERT_TZ() will work for that.but its not working for me.

Here is my query in which i need to convert displaytime to local time zone...so can anyone please guide me?

WHERE displaytime >= \'2012-12-01 00:00:00\'
  AND displaytime <=\'2013-02-22 23:59:59\'
  AND ct.organizationId IN (
    SELECT t.organizationId
      FROM organization_ AS t
      JOIN organization_ AS p ON t.treePath LIKE CONCAT(p.treePath, \'%\')
     WHERE p.organizationId = 10707

$\"enter$ SAmple DAta

$\"enter$

回答1:

SELECT CONVERT_TZ() will work for that.but its not working for me.

Why, what error do you get?

SELECT CONVERT_TZ(displaytime,'GMT','MET');

should work if your column type is timestamp, or date

http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_convert-tz

Test how this works:

SELECT CONVERT_TZ(a_ad_display.displaytime,'+00:00','+04:00');

Check your timezone-table

SELECT * FROM mysql.time_zone;
SELECT * FROM mysql.time_zone_name;

http://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html

If those tables are empty, you have not initialized your timezone tables. According to link above you can use mysql_tzinfo_to_sql program to load the Time Zone Tables. Please try this

shell> mysql_tzinfo_to_sql /usr/share/zoneinfo

or if not working read more: http://dev.mysql.com/doc/refman/5.5/en/mysql-tzinfo-to-sql.html

回答2:

In my case, where the timezones are not available on the server, this works great:

SELECT CONVERT_TZ(`date_field`,'+00:00',@@global.time_zone) FROM `table`

Note: global.time_zone uses the server timezone. You have to make sure, that it has the desired timezone!

回答3:

 select convert_tz(now(),@@session.time_zone,'+05:30')

replace '+05:30' with desired timezone. see here - https://stackoverflow.com/a/3984412/2359994

to format into desired time format, eg:

 select DATE_FORMAT(convert_tz(now(),@@session.time_zone,'+05:30') ,'%b %d %Y %h:%i:%s %p')

you will get similar to this -> Dec 17 2014 10:39:56 AM

来源：https://stackoverflow.com/questions/15017799/how-to-convert-utc-date-to-local-time-zone-in-mysql-select-query

标签

mysql

utc

localtime

convert-tz