我有一个查询,它显示了我在TyreMan
列中最常见的值。这一列中的很多值都是空的,所以我试图忽略它们,但它似乎没有工作。
$result = mysql_query("SELECT TyreMan, COUNT(TyreMan) AS countTyreMan
FROM Pictures
WHERE Tyreman IS NOT NULL
GROUP BY TyreMan
ORDER BY countTyreMan DESC
LIMIT 1");
我把它放错地方了吗?谢谢
试一下
$result = mysql_query("SELECT TyreMan, COUNT(TyreMan) AS countTyreMan
FROM Pictures WHERE (Tyreman) IS NOT NULL
GROUP BY TyreMan ORDER BY countTyreMan DESC LIMIT 1");
Use () with列名。