如何在 MySql 选择查询中将 UTC 日期转换为本地时区
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How to Convert UTC Date To Local time Zone in MySql Select Query
提问by User 1531343
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.
我在 MySql 数据库的其中一个查询中使用了这个 Where 条件。我的问题是我的表中有一个显示时间列，但该表列以 UTC 时间显示数据。我想在本地时间中转换该显示时间列Zone.so 如何从查询本身提供此功能。
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.
我已经对这些东西进行了检查，因此我知道类似的东西SELECT CONVERT_TZ()会为此起作用。但它对我不起作用。
Here is my query in which i need to convert displaytime to local time zone...so can anyone please guide me?
这是我的查询，我需要将显示时间转换为本地时区...所以有人可以指导我吗？
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
SAmple DAta
样本数据
回答by iiro
SELECT CONVERT_TZ() will work for that.but its not working for me.
SELECT CONVERT_TZ() 将为此工作。但它对我不起作用。
Why, what error do you get?
为什么，你得到什么错误？
SELECT CONVERT_TZ(displaytime,'GMT','MET');
should work if your column type is timestamp, or date
如果您的列类型是时间戳或日期，则应该有效
http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_convert-tz
http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_convert-tz
Test how this works:
测试它是如何工作的：
SELECT CONVERT_TZ(a_ad_display.displaytime,'+00:00','+04:00');
Check your timezone-table
检查您的时区表
SELECT * FROM mysql.time_zone;
SELECT * FROM mysql.time_zone_name;
http://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html
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_sqlprogram to load the Time Zone Tables. Please try this
如果这些表为空，则说明您尚未初始化时区表。根据上面的链接，您可以使用mysql_tzinfo_to_sql程序加载时区表。请试试这个
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
或者如果不工作阅读更多：http: //dev.mysql.com/doc/refman/5.5/en/mysql-tzinfo-to-sql.html
回答by Felix Geenen
In my case, where the timezones are not available on the server, this works great:
在我的情况下，服务器上没有时区，这很好用：
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!
注意： global.time_zone 使用服务器时区。您必须确保它具有所需的时区！
回答by Som
select convert_tz(now(),@@session.time_zone,'+05:30')
replace '+05:30' with desired timezone. see here - https://stackoverflow.com/a/3984412/2359994
用所需的时区替换“+05:30”。见这里 - https://stackoverflow.com/a/3984412/2359994
to format into desired time format, eg:
格式化为所需的时间格式，例如：
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
你会得到类似的结果 -> 2014 年 12 月 17 日上午 10:39:56
