MySql database design for a quiz

Question

I\'m making an online quiz with php and mysql and need a bit of help deciding how to design the database for optimal insert of questions/answers and to select questions for

Answer 1

It'd be better to store the possible answers in a seperate table. This allows you to have any amount of answers per question instead of just 4. It also allows questions to have a different number of answers. If you have more than one quiz, you may also want a Quizes Table.

Quizes:
  id
  name

Questions:
  id
  quiz
  prompt

Answers:
  id
  question
  prompt

QuizResult (someone taking a quiz)
  id
  quiz
  // other information about the quiz taker, possibly including the time

Now the correct answer thing gets a lot more tricky. I prefer the higher implementations here:

Each question has a value and each answer has value

A system I recently worked with you could assign a point value for each question and each answer. Incorrect answers often got 0, correct answers got the full amount. You could also have partially-correct answers using this method. This is the method I would go with.

You could go and say every question is worth 10 points or you could assign different weights to different questions:

Questions:
    id
    quiz
    prompt
    value (you can make this question worth more or less)

  Answers:
    question
    prompt
    value (you can make this answer worth more or less)

Store the correct answer in the Answers Table

A more simple (but less robust) solution is to simply say which answer is correct in the Answers table.

Answers:
    question
    prompt
    is_correct

Store the correct answer in the Questions Table

I wouldn't recommend it. When you create a question, it won't have a correct answer until you insert one. This means at least 3 queries to correctly make a question. If you use foreign key dependencies, this will quickly get annoying.