无法使用PHP从数据库检索信息

Question

I have a very simple piece of code i cant get working. I am just trying to search these three tables for these values. When I remove the second two Select statements it works and no matter what table i choose from it works. It has something to do with the UNION statements.Thanks

$query =    "SELECT First_Name, Last_Name, yards FROM quarterbacks WHERE  Nickname='$nickname' AND Last_Name='$last_name'
            UNION 
            SELECT First_Name, Last_Name, yards FROM runningbacks WHERE Nickname='$nickname' AND Last_Name='$last_name'
            UNION 
            SELECT First_Name, Last_Name, yards FROM recievers WHERE Nickname='$nickname' AND Last_Name='$last_name'";

$result =mysqli_query($db, $query) or die('error getting data');

Answer 1

Try This

$query= "SELECT  quarterbacks.First_Name AS a, quarterbacks.Last_Name AS b, quarterbacks.yards AS c, runningbacks.First_Name AS p, runningbacks.Last_Name AS q, runningbacks.yards AS r, recievers.First_Name AS x, recievers.Last_Name AS y, recievers.yards AS z 
        FROM  quarterbacks, runningbacks, recievers 
        WHERE Nickname='$nickname' AND Last_Name='$last_name'";

Answer 2

I think you have missed single quote

    SELECT First_Name, Last_Name, yards FROM quarterbacks WHERE       
Nickname='$nickname' AND Last_Name='$last_name

SELECT First_Name, Last_Name, yards FROM quarterbacks WHERE Nickname='$nickname' AND Last_Name='$last_name' -<<<<<<