我想为每个用户运行一个统计页面。$b = mysql_query("SELECT * FROM B WHERE userID='$userID'");
$b_num=mysql_num_rowsa_num of A <a href='/a/$userID'>(list)</a> | $b_num of B <a href='/b&
我有一个生日字段,其中包含这些值:09/16/1981 (This one will be used)03/19/1953 (This one will be used)SELECT AVG(NULLIF(YEAR(NOW())-YEAR(Birthdate), 0)) AS AvgAge FROM `Us