mysql line is not working properly

[swapna10]

I am using php/mysql for my project.

I have ONE problem here. My mysql query is not working ..I don't know why? Here is that line -
$query =mysql_query("SELECT Course_ID FROM Course where Student_ID='$Stud_ID' AND Course_Name='COSC 3312' AND Course_Name='COSC 2430'");
$count=mysql_num_rows($query);echo $count;

If I try to echo count, it will give me 0. It is supposed to give me 1. That is how it is not working.
If anyone knows, let me know....

[bradgrafelman]

No, that query should never return results, because the WHERE condition will always evaluate to FALSE (thus no rows will be matched). Look at the last two subconditions:

Course_Name='COSC 3312' AND Course_Name='COSC 2430'

Course_Name can't be two different values at once, thus those two conditions together can never be satisfied.