Question

我有3张表如下：

Table 1: FormFields (FieldID, FormID, Title, DateModified, ...)
Table 2: ReportItems (ReportItemID, ReportID, FormID, Title, DateModified, ...)
Table 3: FormValues (ValueID, FormID, FieldID, Value, UserName, DateModified, ...)

例如，我选择了2个FormFields字段作为我的ReportItems。这两个领域是问答情侣。每个问题可以有1个答案，也可以为NULL。关键是结果应该是这样的html数据列表（dl），其中'dt'和'dd'是这样的：

ReportID    FormID  FieldID Value (Question1)   UserName
ReportID    FormID  FieldID Value (Answer1)     UserName
ReportID    FormID  FieldID Value (Question2)   UserName
ReportID    FormID  FieldID Value (Answer2)     UserName
ReportID    FormID  FieldID Value (Question3)   UserName
ReportID    FormID  FieldID Value (Answer3)     UserName

Question 1
    Answer 1
Question 2

Question 3
    Answer 3
Question 4

Question 5
    Answer 5

我使用了这样的查询，但它没有返回我希望的结果：

select rf.FormID, rf.FieldID, rf.ReportItemTitle, v.Value from 
    (select r.ReportItemID, r.FormID, r.FieldID, r.Title as ReportItemTitle from 
        (select ReportItemID, ReportID, FormID, FieldID, Title 
            from ReportItems 
            where FormID = '2D6C42E1-0C95-4E40-B792-A17E00C001BF' and ShowInList = 0) r
    JOIN
        (select FormID, FieldID, Title 
            from FormFields 
            where FormID = '2D6C42E1-0C95-4E40-B792-A17E00C001BF') f
        ON r.FormID = f.FormID AND r.FieldID = f.FieldID) rf
LEFT JOIN
    (select FormID, FieldID, Value
        from FormValues 
        where FormID = '2D6C42E1-0C95-4E40-B792-A17E00C001BF' and UserName = '0000000000') v
ON rf.FormID = v.FormID AND rf.FieldID = v.FieldID

FormID                                  FieldID                                 ReportItem's Title  Values
2D6C42E1-0C95-4E40-B792-A17E00C001BF    E7A78AC7-10A4-4752-85D6-A17E00C22EF9    Question's Title    user's 1st question goes here...
2D6C42E1-0C95-4E40-B792-A17E00C001BF    E7A78AC7-10A4-4752-85D6-A17E00C22EF9    Question's Title    user's 2nd question goes here...
2D6C42E1-0C95-4E40-B792-A17E00C001BF    E7A78AC7-10A4-4752-85D6-A17E00C22EF9    Question's Title    user's 2nd question goes here...
2D6C42E1-0C95-4E40-B792-A17E00C001BF    8E1FAC2A-02F1-4D0D-A3E0-A184001484D8    Answer's Title  admin's answer to user's 1st question

注意：

空答案是未被回答的（NULL）。
结果应基于用户名和 ReportID
所有ID均为GUID
问题和答案都存储在FormValues表中

也许我应该使用光标，但我真的很困惑该怎么做。如果有人帮助我，我将非常感激。

非常感谢，

Kardo

Answer 1

我想我知道你的意思

ReportID    FormID  FieldID Value (Question1)   UserName
ReportID    FormID  FieldID Value (Answer1)     UserName

你想在同一个选择栏中提出问题和答案吗？你需要按reportID，FormID，FieldID排序，让表示逻辑跟踪当前的id，以嵌套的方式显示它（或者你需要一个orm-tool来为你和用户制作一个对象模型的映射）< / p>

 <ul>
    <li>report1
        <ul>
           <li>form1
               <ul>
                  <li> question1
                      <ul>
                          <li>answer 1 by user 1</li>
                          <li>answer 2 by user 2</li>

...

如何从属性值表结构中获取数据？

1 个答案: