I tried doing a SELECT DATE(ColumnName)
, however this does not work for TIMESTAMP
columns† because they are stored in UTC and the UTC date is used instead of converting to the local date. I needed to select rows that were on a specific date in my time zone, so combining my answer to this other question with Balaswamy Vaddeman's answer to this question, this is what I did:
If you are storing dates as DATETIME
Just do SELECT DATE(ColumnName)
If you are storing dates as TIMESTAMP
Load the time zone data into MySQL if you haven't done so already. For Windows servers see the previous link. For Linux, FreeBSD, Solaris, and OS X servers you would do:
mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root -p mysql
Then format your query like this:
SELECT DATE(CONVERT_TZ(`ColumnName`, 'UTC', 'America/New_York'))
You can also put this in the WHERE
part of the query like this (but note that indexes on that column will not work):
SELECT * FROM tableName
WHERE DATE(CONVERT_TZ(`ColumnName`, 'UTC', 'America/New_York')) >= '2015-02-04'
(Obviously substitute America/New_York
for your local time zone.)
† The only exception to this is if your local time zone is GMT and you don't do daylight savings because your local time is the same as UTC.