Mysql_num_rows()期望参数1是resource, Boolean给出

我正在我的网站内建立一个搜索。我对DB有意见。它给了我这个:

Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in C:'Program Files (x86)'EasyPHP-5.3.5.0'www'searchscript'search.php on line 86

我将向您展示给出这种错误的代码部分

line 82: $query = "SELECT * FROM dreams WHERE titolo,titch LIKE '"%$trimmed%'" ORDER BY id_dreams DESC "; 
line 85: $numresults=mysql_query($query);
line 86: $numrows=mysql_num_rows($numresults); //error

现在我试着看看查询背后的问题是什么，它告诉我这个:

SELECT * FROM dreams WHERE titolo, titch LIKE "%tags%" ORDER BY id_dreams DESC 

你的SQL语法有错误;查看MySQL服务器版本对应的手册，以获取使用"LIKE"标签的正确语法。ORDER BY id_dreams DESC' at line 1

背后的代码是:

$query = "SELECT * FROM dreams WHERE titolo, titch LIKE '"%$trimmed%'" ORDER BY id_dreams DESC "; 
$result = mysql_query($query) or die($query."<br/><br/>".mysql_error());