Question

我有一对多的关系。我想用父记录在一行中显示我的孩子记录这里是我的查询LIKE数据透视表我想显示学生在1行考试中获得的分数，这取决于在表1中注册了多少考试，我有父ID和表2我有考试子组件，如

父母考试viva和子组件viva 1和viva 2

现在学生查询将有2列exam1标记和考试2分标记，这是1个考试中的两个标记所以这将是单行像

    student  | viva 1  | viva 2

我的主要考试ID是1，组件viva 1和viva 2 ID是21,22

现在用两个ID标记保存在标记表中我现在想要在单行中查看它们在考试的标记中是什么？和viva 2标记???

SELECT DISTINCT    
    A.S_RNo, A.S_SNo, C.S_SName, G.S_RID, A.Crs_SID, A. Enr_ID,
    0 AS M_ObtMarks
FROM 
    tblAcdEnrol_Course A
INNER JOIN 
    tblAcdStudent_Reg G ON A.S_RNo = G.S_RNo      
INNER JOIN 
    tblAcdStudent C ON A.S_SNo = C.S_SNo
LEFT OUTER JOIN 
    tblAExPolicy_1 D ON A.ESec_T_ID = D.ESec_T_ID
LEFT OUTER JOIN 
    tblAExPolicy_2 E ON D.AEx_ID = E.AEx_ID  
CROSS APPLY 
    (SELECT DISTINCT    
         A.S_RNo, A.S_SNo, S_SName, S_RID, Crs_SID, B.AEx2_ID, 
         C.ESec_T_ID, Enr_ID, ISNULL(M_ObtMarks, 0) AS M_ObtMarks
     FROM 
         tblAExMarks_1 A 
     INNER JOIN
         tblAExPolicy_2 B ON A.AEx2_ID = B.AEx2_ID
     INNER JOIN
         tblAExPolicy_1 C ON B.AEx_ID = C.AEx_ID
     INNER JOIN
         tblAcdStudent_Reg D ON A.S_RNo = D.S_RNo
     INNER JOIN 
         tblAcdEnrol_Course E ON E.S_RNo = A.S_RNo
     INNER JOIN   
         tblAcdStudent F ON F.S_SNo = A.S_SNo)V      
     WHERE 
         V.ESec_T_ID = 6  
         AND V.Crs_SID <> 2   
         AND V.AEx2_ID = 1

不工作

目前

       1    21  5.0
       1    21  10.0
       1    21  10.0
       2    21  4.0
       2    21  10.0
       2    21   8.0

我想要

       1    21  5.0 10.0 10.0           
       2    21  4.0 10.0  8.0

图片

problem pic

Answer 1

您可以在输出数据上使用pivot，如下所示：

;with cte as (
SELECT   DISTINCT    A.S_RNo , A.S_SNo, C.S_SName, G.S_RID,A.Crs_SID   , A. Enr_ID,0 AS M_ObtMarks,
RowN = Row_number() over (Partition by A.S_RNo, A.S_SNo order by A.S_RNo)
 FROM tblAcdEnrol_Course A
 INNER JOIN tblAcdStudent_Reg G ON A.S_RNo = G.S_RNo      
 INNER JOIN tblAcdStudent C ON A.S_SNo = C.S_SNo
 LEFT OUTER JOIN tblAExPolicy_1 D ON A.ESec_T_ID = D.ESec_T_ID
 LEFT OUTER JOIN tblAExPolicy_2 E ON D.AEx_ID = E.AEx_ID  


 CROSS APPLY (
 SELECT   DISTINCT    A.S_RNo , A.S_SNo, S_SName, S_RID, Crs_SID ,B. AEx2_ID , C.ESec_T_ID , Enr_ID,ISNULL(M_ObtMarks , 0) AS M_ObtMarks
 from tblAExMarks_1 A 
 inner join tblAExPolicy_2 B on A.AEx2_ID = B.AEx2_ID
 inner join tblAExPolicy_1 C on B.AEx_ID = C.AEx_ID
 inner join tblAcdStudent_Reg D ON A.S_RNo = D.S_RNo
 INNER JOIN tblAcdEnrol_Course E ON E.S_RNo = A.S_RNo
 INNER JOIN   tblAcdStudent F ON F.S_SNo = A.S_SNo)V      
  WHERE V.ESec_T_ID  =  6  AND V.Crs_SID <> 2   and  V.AEx2_ID = 1
)
select * from cte 
pivot (max(M_ObtMarks) for RowN in ([1],[2],[3]) ) p

用于显示1行中所有子记录的SQL查询？

1 个答案: