試圖選擇具有最高時間戳值和最低ID值的20個項目？

Question

我試圖選擇具有最高的20「時間戳」值的行，並從這些20行1列具有最低ID值：

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

上面的查詢不工作，但它是有道理對我來說。這個查詢有什麼問題嗎？

Answer 1

錯誤是#1248 - Every derived table must have its own alias這的確如此。這應該工作：

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

Answer 2

嘗試這樣：

$result_last = mysql_query("SELECT * FROM Events WHERE TimeStamp IN(SELECT TimeStamp FROM Events ORDER BY TimeStamp DESC LIMIT 10") ORDER BY TimeStamp ASC LIMIT 1);