从值插入到MySQL表并选择语句

Question

我想通过从另一个表中选择字段将值插入一个表中，并添加诸如date和login_id之类的信息（这些都不来自我所选择的表）。

$sql = "INSERT INTO questions_to_answer (login_id, question_id, Question_Category, QuestionType, Question, Meaning) VALUES (?,?,?,?,?,?)";
$stmt= $DB_con->prepare($sql);

$stmt->execute($test_user_id, 
    "SELECT question_id, 
            Question_Category, 
            QuestionType, 
            Question, 
            Meaning all_questions 
      WHERE personality_profile_questions.Question_Category = 1");

Answer 1

您需要在prepare包含SELECT ，在执行中不能包含SQL命令。 如果在执行中，它将被视为文字字符串，用引号引起来并转义。

尝试：

$sql = "INSERT INTO questions_to_answer (login_id, question_id, Question_Category, QuestionType, Question, Meaning) 
        SELECT ?, question_id, Question_Category, QuestionType, Question, Meaning 
        WHERE personality_profile_questions.Question_Category = 1";
$stmt= $DB_con->prepare($sql);
$stmt->execute(array($test_user_id));

假设$test_user_id = login_id 。 我不清楚all_questions是什么。