Group by day from timestamp

Question

In my posts table, it saves timestamp for each post record.

What query can group posts by day, using this timestamp column?

Answer 1

How about this? Using the DATE function:

 SELECT DATE(FROM_UNIXTIME(MyTimestamp)) AS ForDate,
        COUNT(*) AS NumPosts
 FROM   MyPostsTable
 GROUP BY DATE(FROM_UNIXTIME(MyTimestamp))
 ORDER BY ForDate

This will show you the number of posts on each date that the table has data for.