MySQL query: show number of entries by day

I have a table with structure:

id|name|       date
---------------------------
 1|qwer|2011-08-29 13:11:59
 2|wert|2011-08-29 13:11:59
 3|erty|2011-08-30 13:11:59
 4|rtyu|2011-08-31 13:11:59

I need a query to show开发者_Go百科 data like this:

    day   |number_of_entries
----------------------------
2011-08-29|                2
2011-08-30|                1
2011-08-31|                1

Using the GROUP BY function and the COUNT function gives the following:

SELECT DATE(`date`), COUNT(*) AS number_of_entires
FROM tablename
GROUP BY DATE(`date`)
ORDER BY `date`

GROUP BY - MySQL Reference Manual

DATE - MySQL Reference Manual

SELECT   DATE(`date`) AS day,
         COUNT(*)     AS number_of_entries
FROM     mytable
GROUP BY DATE(`date`)

Use MySQL's DATE() function.