我有一个XML脚本，如何在Xpath中编写查询?

Question

我有一个XML脚本，如何在Xpath中编写查询？查询是否应显示平均课程成绩高于 70 的学生姓名？

.XML

<Students>
<student StudentID="12">
<StudentName>Ruti Dohan</StudentName>
<CourseID>49001</CourseID>
<Grade>100</Grade>
</student>
<student StudentID ="13">
<StudentName >Lola Tomas</StudentName>
<CourseID>77301</CourseID>
<Grade>90</Grade>
</student>
<student StudentID ="14">
<StudentName>Lola Tomas</StudentName>
<CourseID>49001</CourseID>
<Grade>55</Grade>
</student>
<student StudentID ="15">
<StudentName>Reli Mitai</StudentName>
<CourseID>77301</CourseID>
<Grade>80</Grade>
</student>
</Students>

Answer 1

这个 xpath 表达式应该能带你到达那里：

//student[Grade>70]/StudentName

输出：

Ruti Dohan
Lola Tomas
Reli Mitai