具有来自不同表的两个选择的SQL子查询给出随机选择

Question

具有来自不同表的两个选择的SQL子查询提供随机选择

select top(1) Questions.Ques_ID, Question 
from Questions 
where   Questions.Ques_ID in(
                   select   top(4)  Answers.Que_ID,Answer 
                   from Answers 
                   where  Questions.Ques_ID = Answers.Que_ID   
                   order by newid())

Answer 1

使用IN()时，两侧应出现相同数量（和类型）的元素！

select top(1) Questions.Ques_ID, Question 
from Questions 
where   Questions.Ques_ID in(
                             select   top(4)  Answers.Que_ID 
                               from Answers 
                               where  Questions.Ques_ID = Answers.Que_ID   
                               order by newid())

Answer 2

对我来说，似乎你想得到一个随机问题匹配答案？

SELECT TOP 1 ques.Ques_ID, 
             ques.Question, 
             ans.Answer
    FROM Questions ques
    INNER JOIN Answers ans ON ans.ExamCode = ques.ExamCode AND ans.Que_Id = ques.Ques_ID
    ORDER BY NEWID()

这是你想要的吗？