database - 来自值组合的值 - 数据库设计

Question

我有一个调查 Web 应用程序。调查可以有多项选择题。多项选择题的答案可能取决于其他问题的答案。

例子:

Question 1 has choices: HP, Acer, Samsung, Lenovo
Question 2 has choices: Android, Ubuntu, iOS, Windows
Question 3 has choices: Ubuntu, OS X, Windows
Question 4 has choices: Adidas, Nike, Puma

假设问题 4 取决于问题 1、2 和 3 的答案组合。

示例 1:

If a person answers: Question 1 = "HP", Question 2 = "Ubuntu", Question 3 = "OS X"; Question 4 is automatically set to "Puma"

示例 2:

If a person answers: Question 1 = "Acer", Question 2 = "Ubuntu", Question 3 = "Ubuntu"; Question 4 is automatically set to "Adidas"

*两个例子逻辑相同

一般来说，一些调查问题的答案可以依赖于其他一些调查问题的答案。

您如何为此目的设计/建模数据库？

这是我创建的初始表关系(随意修改它):

Users: user_id
Questions: question_id
Choices: choice_id, question_id
Answers: answer_id, user_id, question_id

附加信息:

我想做的管理用户界面过程是:

1. The admin creates several independent questions (questions which have answers independent of other questions' answer)
2. The admin creates a dependent question, selects one or many questions which he created earlier, selects a combination of answers from those question (just like in examples 1 and 2 above) and then sets an answer for the dependent question based on those combination of answers.
... The admin proceeds creating several more questions.

编辑:

感谢@MahmoudGamal 的想法。我根据您的设计创建了一些东西:

 Combinations table
 ID
 question_id # the dependent question's id
 choice_id # the automatic answer based on the combination of other answers

 Answer Combinations table
 ID
 combination_id
 question_id # the question that is depended upon by the dependent question
 choice_id # the choice that will be used for the combination

所以对于一个问题我可以有多种组合。例子: 如果我想让问题4接受几种组合。一种组合有不同的答案。

 Answer Combinations table
 ID     combination_id     question_id     choice_id
 1      1                  1               1
 2      1                  2               2
 3      1                  3               3
 4      2                  1               2
 5      2                  2               2
 6      2                  3               1

组合表会有

 Combinations table
 ID     question_id     choice_id
 1      4               4
 2      4               3

对我来说看起来很整洁。你怎么看？

PS:请原谅我，我是 Stack Overflow 的新手，我仍在摸索中。

Answer 1

这是我可以从您的问题中理解的场景:

管理员指定上一个问题的答案和另一个问题之间的关系，根据这个条件，这个问题将根据这个关系自动回答，这个逻​​辑关系是手动指定的。因此，为此，您还需要两个表:

PreviousQuestionsAnswers:

• 问题编号,
• PreviousQuestionId,
• PreviousAnswerID

QuestionPreAnswer:

• 问题编号,
• AnswerId

例如:

If a person answers: Question 1 = "HP", Question 2 = "Ubuntu", Question 3 = "OS X"; Question 4 is automatically set to "Puma"

然后这两个表会有类似的东西:

PreviousQuestionsAnswers:

QuestionId PreviousQuestionId PreviousAnswerId
    4              1                 1
    4              2                 2
    4              3                 3

QuestionPreAnswer:

QuestionId AnswerId
    4         4

请注意:这些数据是由管理员预先输入的，因此，从应该参加该调查的 OP 之后的前端应用程序，您将匹配他在之前的问题中输入的答案在 PreviousQuestionsAnswers 表中预定义的条件下，应该输入到您已有的 Answers 中，如果是这样，则使用选项 QuestionPreAnswer 设置问题。