php - 如何选择然后插入phpmyadmin？

Question

我怎样才能正确地进行选择，然后将结果插入到 $result 中？

$result = mysql_query("SELECT AVG(answervalue) 
                        FROM `tblanswer` 
                        WHERE questiontype = 'Methods' 
                         AND studentid = '$username' 
                         AND subjectname = '$server_subject' 
                         AND professorname = '$server_name', $connect);

$Query = "INSERT INTO tblevaluationgrade (result) VALUES ('$result')";

Answer 1

你的查询应该是这样的:

INSERT INTO tblevaluationgrade(result_column) 
   (SELECT AVG(answervalue) FROM `tblanswer`   
     WHERE questiontype = 'Methods' AND studentid = '$username'   
       AND subjectname = '$server_subject' AND professorname = '$server_name')