如何为DATE分组的MAX DATE在mysql中选择相应的列

Question

mysql table: stats

columns: 
         date           | stats
05-05-2015 22:25:00     | 78
05-05-2015 09:25:00     | 21
05-05-2015 05:25:00     | 25
05-04-2015 09:25:00     | 29
05-04-2015 05:25:00     | 15

sql query:

SELECT MAX(date) as date, stats FROM stats GROUP BY date(date) ORDER BY date DESC

when I do this, I does select one row per date (grouped by date, regardless of the time), and selects the largest date with MAX , but it does not select the corresponding column. for example, it returns 05-05-2015 22:25:00 as the date , and 25 as the stats . It should be selecting 78 as the stats . I've done my research and seems like solutions to this are out there, but I am not familiar with JOIN or other less-common mysql functions to achieve this, and it's hard for me to understand other examples/solutions so I decided to post my own specific scenario.

Answer 1

This question is asked every single day in SO. Sometimes, it's correctly answered too. Anyway, purists won't like it but here's one option:

Select x.* from stats x join (SELECT MAX(date) max_date FROM stats GROUP BY date(date)) y on y.max_date = x.date;

Obviously, for this to work dates need to be stored using a datetime data type.