Question

当我想点击详细信息时出现此错误：

您的SQL语法有错误;检查手册对应于您的MySQL服务器版本，以便使用正确的语法接近＆＃39;和sq.testid = 5），0）作为学生的om作为s，测试为t，subject as sub，studentstes＆＃39;在第1行

$result=executeQuery("select s.stdname,s.nume_student,s.prenume_student,
         t.testname, t.testdesc,sub.subname,sub.subdesc,sub.an,
         DATE_FORMAT(st.starttime,'%d %M %Y ') as stime,
         DATE_FORMAT(st.starttime,' %H:%i:%s') as stimes,
         TIMEDIFF(st.endtime,st.starttime) as dur,
         (select sum(marks) 
              from question 
                where testid=".$_REQUEST['details'].") as tm,
         IFNULL((select sum(q.marks) 
              from studentquestion as sq, question as q 
                 where sq.testid=q.testid and sq.qnid=q.qnid 
                    and sq.answered='answered' and sq.stdanswer=q.correctanswer 
                    and sq.stdid=".$_REQUEST['stdid']."  
                    and sq.testid=".$_REQUEST['details']."),0) as om 
             from student as s,test as t, subject as sub,studenttest as st 
                where s.stdid=st.stdid and st.testid=t.testid 
                   and t.subid=sub.subid and st.stdid=".$_REQUEST['stdid']." 
                   and st.testid=".$_REQUEST['details'].";") ;

我知道问题是sq.stdid=".$_REQUEST['stdid']."和st.stdid=".$_REQUEST['stdid']."，但我不知道如何解决它。

Answer 1

调试的典型方法是打印出生成的查询。

从我所看到的（以及你得到的错误信息）看来似乎在这里：

nd sq.testid=".$_REQUEST['details']."),0) as om

)之前的结束,0)似乎是错误的。

sql查询语法错误

1 个答案: