Question

我想使用给定的输出生成xquery。我的XML如下：

   <?xml version="1.0" encoding="UTF-8"?>

   <S_db>
    <student id="94811">
    <name>Rusty Nail</name>
    <quizzes>
        <quiz>16</quiz>
        <quiz>12</quiz>
    </quizzes>
    <projects>
        <project>44</project>
        <project>52</project>
    </projects>
    <exams>
        <exam>77</exam>
        <exam>68</exam>
        <exam>49</exam>
        </exams>
    </student>
    <student id="2562">
    <name>Guy Wire</name>
    <quizzes>
        <quiz>15</quiz>
        <quiz>23</quiz>
    </quizzes>
    <projects>
        <project>33</project>
        <project>47</project>
        </projects>
    <exams>
        <exam>78</exam>
        <exam>86</exam>
        <exam>88</exam>
    </exams>
    </student>
    <student id="137745">
    <name>Barb Wire</name>
    <quizzes>
        <quiz>20</quiz>
        <quiz>25</quiz>
    </quizzes>
    <projects>
        <project>48</project>
        <project>60</project>
        </projects>
    <exams>
        <exam>38</exam>
        <exam>48</exam>
        <exam>66</exam>
    </exams>
    </student>
    </S_db>

要生成的输出如下：

<?xml version="1.0" encoding="UTF‑8"?>
<projects>
<student>
<name>Barb Wire</name>
<total>108</total>
</student>
<student>
<name>Guy Wire</name>
<total>80</total>
</student>
<student>
<name>Rusty Nail</name>
<total>96</total>
</student>

我尝试按如下方式生成Xquery：

    <student>
   {for $i in (1 to 3) return
   <total> { for $a in /S_db
   let $s := sum($a/student[$i]/projects/project)
   let $name := $a/student[$i]/name
   return ($s)}
   </total>
   }
  </student>

我当前的输出：

<?xml version="1.0" encoding="UTF-8"?>
<student>
<total>96</total>
<total>80</total>
<total>108</total>
</student>

我不知道如何使用相应的总标记获取该名称标记。我已将特定学生的name元素存储在名称变量

中

Answer 1

这是一种可能的方式：

<projects>
{
    for $s in /S_db/student
    return 
    <student>
    {
        $s/name,
        <total>{sum($s/projects/project)}</total>
    }
    </student>
}
</projects>

<强> xpathtester.com demo

输出

<?xml version="1.0" encoding="UTF-8"?>
<projects>
   <student>
      <name>Rusty Nail</name>
      <total>96</total>
   </student>
   <student>
      <name>Guy Wire</name>
      <total>80</total>
   </student>
   <student>
      <name>Barb Wire</name>
      <total>108</total>
   </student>
</projects>

使用给定的输出生成xquery

1 个答案: