Question

I am trying to select rows with the 20 highest ‘TimeStamp’ value, and from those 20 rows the 1 row with the lowest ID value:

$result_last = mysql_query("SELECT * FROM (SELECT * FROM Events ORDER BY TimeStamp DESC LIMIT 20) ORDER BY ID ASC LIMIT 1");

The above query doesn’t work, but it makes sense to me. Is there something wrong with this query?

Answer 1

The error is #1248 - Every derived table must have its own alias and this is indeed true. This should work:

$result_last = mysql_query("SELECT * FROM (SELECT * FROM Events ORDER BY TimeStamp DESC LIMIT 20) AS T ORDER BY ID ASC LIMIT 1");