将多个查询的结果作为SQL Server存储过程中的一个结果结合起来

我需要一些关于存储过程的帮助。它包含一个运行Select查询的循环。如果它循环三次，我得到的结果是3个表。如何将结果组合为一个表格？将多个查询的结果作为SQL Server存储过程中的一个结果结合起来

的过程如下：

CREATE PROCEDURE [dbo].[spGetRndQuestions] 
    @ExamCode Nvarchar(60) 
AS 
BEGIN 
    Declare @NosQues Int, @Catgry nvarchar(50) 

    DECLARE CategCursor CURSOR FOR 
     (Select Category From tblExamDetail Where ExamCode = @ExamCode) 

    OPEN CategCursor 

    FETCH NEXT FROM CategCursor INTO @Catgry 

    WHILE @@FETCH_STATUS = 0 
    BEGIN 
     SET @NosQues = (Select NoOfQues from tblExamDetail Where [email protected] AND [email protected]) 

     SELECT TOP(@NosQues) QM.QuestionID, QM.QuestionDesc, QM.QuestionMarks, QM.Answer1, QM.Answer2, QM.Answer3, QM.Answer4 FROM tblQuestionMaster QM 
      INNER JOIN tblExamMaster EM ON QM.Dept = EM.Dept AND QM.Location = EM.Location AND QM.QuesModule = EM.ExamModule 
       Where [email protected] AND QM.Category [email protected] 
       Order by NEWID() 

     /*SELECT TOP (@NosQues) QuestionID,QuestionDesc,Answer1,Answer2,Answer3,Answer4,QuestionMarks from [dbo].[tblQuestionMaster] Where [email protected] AND 
     Order by NEWID() */ 

     FETCH NEXT FROM CategCursor INTO @Catgry 
    END 
CLOSE CategCursor 
DEALLOCATE CategCursor 
END

谢谢你的帮助是真正的赞赏。

来源

2014-03-27 Suresh M

在返回表的适当结构的SP开始处创建表变量。在每次迭代中将选定的数据插入到该表中。取消分配光标后，从该表中选择。

CREATE PROCEDURE [dbo].[spGetRndQuestions] 
@ExamCode Nvarchar(60) AS 
BEGIN 
    Declare @NosQues Int, @Catgry nvarchar(50) 

    DECLARE @tbl TABLE(QuestionID int, QuestionDesc ....) 

    DECLARE CategCursor CURSOR FOR (Select Category From tblExamDetail Where [email protected]) 
    OPEN CategCursor 
    FETCH NEXT FROM CategCursor INTO @Catgry 
    WHILE @@FETCH_STATUS = 0 
    BEGIN 
     SET @NosQues = (Select NoOfQues from tblExamDetail Where [email protected] AND [email protected]) 

     INSERT INTO @tbl 
     SELECT TOP(@NosQues) QM.QuestionID, QM.QuestionDesc, QM.QuestionMarks, QM.Answer1, QM.Answer2, QM.Answer3, QM.Answer4 FROM tblQuestionMaster QM 
      INNER JOIN tblExamMaster EM ON QM.Dept = EM.Dept AND QM.Location = EM.Location AND QM.QuesModule = EM.ExamModule 
       Where [email protected] AND QM.Category [email protected] 
       Order by NEWID() 

     /*SELECT TOP (@NosQues) QuestionID,QuestionDesc,Answer1,Answer2,Answer3,Answer4,QuestionMarks from [dbo].[tblQuestionMaster] Where [email protected] AND 
     Order by NEWID() */ 

     FETCH NEXT FROM CategCursor INTO @Catgry 
    END 
CLOSE CategCursor 
DEALLOCATE CategCursor 

SELECT * FROM @tbl 
END

来源

2014-03-27 20:34:18

非常感谢哈姆雷特，这很有魅力。非常感谢您的帮助。 –

哈姆雷特确实回答了这个问题。但是，您发布的查询可以进行优化以消除对游标或表变量的需求。下面的代码应该很好地做到这一点：

CREATE PROCEDURE [dbo].[spGetRndQuestions] 
    @ExamCode Nvarchar(60) 
AS 

SELECT 
    --A.[category], 
    B.* 
FROM tblExamDetail A 
CROSS APPLY (
    SELECT TOP (A.[NoOfQues]) 
     QM.QuestionID,QM.QuestionDesc,QM.QuestionMarks, 
     QM.Answer1,QM.Answer2,QM.Answer3,QM.Answer4 
    FROM tblQuestionMaster QM 
    INNER JOIN tblExamMaster EM 
    ON QM.Dept = EM.Dept 
     AND QM.Location = EM.Location 
     AND QM.QuesModule = EM.ExamModule 
    WHERE EM.ExamCode = A.[ExamCode] 
     AND QM.Category = A.[Category] 
    ORDER BY NEWID() 
) B 
WHERE A.[ExamCode] = @ExamCode

来源

2014-03-27 20:53:26 CElliott

将多个查询的结果作为SQL Server存储过程中的一个结果结合起来

回答

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