Mysql表中的数据只存储一条记录

Question

我有mysql数据库，我在mysql数据库中添加数据，但问题是它只存储一个不超过这个数据的记录。

我的表结构是

    <?php
    $con =  mysql_connect("example.com","name","password");

    if (!$con)
     {
     die('Could not connect: ' . mysql_error());
     }

     mysql_select_db("surveyipad", $con);

     $response_id=$_POST['response_id'];

     $participant_id=$_POST['participant_id'];


     $question_id=$_POST['question_id'];



     $answer_text=$_POST['answer_text'];


     $answer_option=$_POST['answer_option'];


     $query=("INSERT INTO survey_question_responses (response_id,participant_id,question_id,answer_text,answer_option)

      VALUES ('', '$participant_id','$question_id','$answer_text','$answer_option')");

       mysql_query($query,$con);
       printf("Records inserted: %d\n", mysql_affected_rows());

     echo($response_id)
   ?>

响应id是表中的主键，也设置为自动增量

Answer 1

试试这个

$query=("INSERT INTO survey_question_responses (participant_id,question_id,answer_text,answer_option)

      VALUES ('$participant_id','$question_id','$answer_text','$answer_option')");

Answer 2

当您使id字段自动递增时，请不要通过INSERT查询插入它。

将查询写为

INSERT INTO survey_question_responses (participant_id, question_id, answer_text, answer_option)
VALUES ('$participant_id', '$question_id', '$answer_text', '$answer_option')

您还应该解释或发送表格的结构。