Question

我有以下表格和相关属性：

Survey:
  SurveyID int,
  SurveyTitle nvarchar(50)

SurveyQuestions
 QuestionId int,
 SurveyId fk from Survey table
 Question nvarchar(100)
 QuestionOrder int (eg: 1,2,3)
AnswerType char(1) (M. for Multiple choice answers like Checkbox, S for single like radiobuttion, T for Free Text


SurveyChoices
 ChoiceId int
 QuestionId int fk from SurveyQuestions
 Choice nvarchar(255) (eg: Choices for each question entered by Admin
 IsCorrect bit (1 for Correct choice, 0 for incorrect choice.

SurveyAnswers
 AnswerId int
 ChoiceId int fk from SurveyChoices
 QuetionId int fk from SurveyQuestions
 ChoiceText nvarchar(2000) (For FreeText)

这就是我的需要。

我们想为每个调查显示一个问题，然后是用户的选择，最后是正确的答案或答案。

用户可以检查多个选择答案（复选框）

所以，布局应该是这样的：

Question                               Your Choice                     Correct Answer(s)
How many days in a year?                 365                            365
Tom Cruise Starred in 
what movies? Check all that apply       Rain Man                        Rain Man
                                        Risky Business                  Risky Business
                                        Mission Possible                Mission Impossible

您实际上可以在小提琴上看到sql架构

http://sqlfiddle.com/#!3/4c642/1

礼貌史蒂夫福特。再次感谢史蒂夫。

我的尝试查询如下：

SELECT DISTINCT SQ.question, SC.Choice As CorrectAnswer   
                          FROM surveyquestions AS SQ
                          INNER JOIN surveychoices AS SC ON SQ.QuestionID = SC.QuestionID
                          INNER JOIN surveyanswers AS SA ON SA.QuestionID = SQ.QuestionID AND SC.choiceId = SA.choiceId AND SA.username = 'John.Doe'
                          WHERE SQ.SurveyID = 10

问题似乎是正确的。

正确答案并不完全正确，因为如果汤姆克鲁斯电影的情况不止一个选择是正确的，那么所有这些选择都不会显示。

我们希望每个问题都能显示所有正确的答案。

最后，我无法找到显示用户选择的方法。

非常感谢您的专业协助。

enter image description here

Answer 1

我认为你基本上想要GROUP_CONCAT正确的选择和分别给出的答案然后加入问题

类似这样的事情

WITH CorrectChoices AS
(
  SELECT QuestionID, LEFT(CorrectChoice , LEN(CorrectChoice )-1) AS Choice
  FROM SurveyChoices AS extern
  CROSS APPLY
  (
    SELECT Choice + ', '
    FROM SurveyChoices AS intern
    WHERE extern.QuestionID = intern.QuestionID
    AND intern.IsCorrect=1
    ORDER BY Choice
    FOR XML PATH('')
  ) pre_trimmed (CorrectChoice)
  GROUP BY QuestionID, CorrectChoice
)
, Answer AS
(
  SELECT QuestionID, UserName, LEFT(CorrectChoice , LEN(CorrectChoice )-1) AS Choice
  FROM SurveyAnswers AS extern
  CROSS APPLY
  (
    SELECT Choice + ', '
    FROM SurveyAnswers intern
    INNER JOIN SurveyChoices SC ON SC.QuestionId = intern.QuestionID
                               AND SC.ChoiceID = intern.ChoiceID
    WHERE extern.QuestionID = intern.QuestionID
    ORDER BY Choice
    FOR XML PATH('')
  ) pre_trimmed (CorrectChoice)
  GROUP BY QuestionID, UserName, CorrectChoice
)

SELECT SQ.Question, CC.Choice, A.Choice Answer, 
       CASE WHEN CC.Choice = A.Choice THEN 'Correct' ELSE 'Wrong' END
FROM SurveyQuestions SQ
LEFT JOIN CorrectChoices CC ON CC.QuestionID = SQ.QuestionID
LEFT JOIN Answer A ON A.QuestionID =SQ.QuestionID
WHERE SQ.SurveyID = 10
AND UserName='John Doe'

demo

Answer 2

SELECT Q.question, C.choice, 
  (SELECT  A1.choice FROM SurveyChoices A1 WHERE A1.choiceid = A.choiceid) AS YourChoice
FROM SurveyQuestions AS Q
left JOIN 
  (SELECT C1.questionid, C1.Choice from SurveyChoices C1 WHERE C1.iscorrect = 1) AS C
   ON Q.questionid = C.questionid
left  JOIN SurveyAnswers A ON A.questionid = Q.questionid
WHERE Q.surveyid = 10  ORDER BY Q.questionorder;

http://sqlfiddle.com/#!3/4c642/99

如何使此查询生成我们需要的结果？

2 个答案: