如何在 MySql 选择查询中将 UTC 日期转换为本地时区
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.我想将该显示时间列转换为本地时区.所以我如何从查询本身提供这个功能.
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.
我已经对这些东西进行了检查,因此我知道像 SELECT CONVERT_TZ()
这样的东西会起作用.但它对我不起作用.
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.
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?
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
示例数据
推荐答案
SELECT CONVERT_TZ() 将为此工作.但它对我不起作用.
SELECT CONVERT_TZ() will work for that.but its not working for me.
为什么,你得到了什么错误?
SELECT CONVERT_TZ(displaytime,'GMT','MET');
如果您的列类型是时间戳或日期应该可以使用
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
测试它是如何工作的:
SELECT CONVERT_TZ(a_ad_display.displaytime,'+00:00','+04:00');
检查时区表
SELECT * FROM mysql.time_zone;
SELECT * FROM mysql.time_zone_name;
http://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html
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
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
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
or if not working read more: http://dev.mysql.com/doc/refman/5.5/en/mysql-tzinfo-to-sql.html
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