SQL Server2005とasp.net2008をc#で使用しています...2つのテーブルResultとStud_Info......があります。
1] Stud_Info
CREATE TABLE Stud_Info
(Enroll_Number varchar(20) NOT NULL,
Salutation varchar(10) NULL,
First_Name varchar(20) NULL,
Middle_Name varchar(20) NULL,
Last_Name varchar(20) NULL,
Course_Id varchar(20) NULL,
Batch varchar(20) NULL)
INSERT into Stud_Info values(11161,'Mr.','Mack','B','Botha','MECH','Batch1');
INSERT into Stud_Info values(11162,'Mr.','John','A','Los','CIVIL','Batch2');
INSERT into Stud_Info values(11163,'Ms.','Merry','F','Dsuza','ELCT','Batch1');
INSERT into Stud_Info values(11164,'Mr.','Pow','B','Janero','MECH','Batch2');
INSERT into Stud_Info values(11165,'Mr.','Martin','J','Smith','MECH','Batch1');
SELECT * from Stud_Info
2番目のテーブルはこのようなものです...
2] Exam_Result
CREATE TABLE Exam_Result
(Result_Id numeric(18, 0) IDENTITY(1,1) NOT NULL,
Enroll_Number varchar(50) NULL,
Student_Name varchar(100) NULL,
Course_Id varchar(50) NULL,
Semester varchar(50) NULL,
Subject_Id varchar(50) NULL,
Subject_Name varchar(50) NULL,
MarksObtained numeric(18, 0) NULL,
Exam_Type varchar(50) NULL)
INSERT into Exam_Result values(11161,'Mack B Botha','MECH',1,'MT','Maths',25,'Internal1');
INSERT into Exam_Result values(11161,'Mack B Botha','MECH',1,'EN','English',22,'Internal1');
INSERT into Exam_Result values(11161,'Mack B Botha','MECH',1,'SC','Science',20,'Internal1');
INSERT into Exam_Result values(11166,'Barden V John','CIVIL',1,'SS','Social',21,'Internal2');
INSERT into Exam_Result values(11161,'Mack B Botha','MECH',2,'SM','Simple Maths',24,'Internal2');
INSERT into Exam_Result values(11161,'Mack B Botha','MECH',2,'SM','Simple Maths',69,'Final');
SELECT * from Exam_Result
サブジェクトの行から列への動的変換にこのストアドプロシージャを使用しています......正常に動作します。
Create Proc GetExamResults (@Course_Id varchar(100), @Semester varchar(10))
as
begin
declare @subjname varchar(100)
declare @subjects varchar(7000)
declare @subjectsselection varchar(7000)
declare @SumSelection varchar(7000)
declare @NoOfSubjects int
set @NoOfSubjects = 0
set @subjects = ''
set @subjectsselection = ''
set @SumSelection = ''
DECLARE subject_cursor CURSOR
FOR SELECT distinct Subject_Name FROM Exam_Result where course_id = @Course_Id And Semester = @Semester
OPEN subject_cursor
FETCH NEXT FROM subject_cursor
INTO @subjname
WHILE @@FETCH_STATUS = 0
BEGIN
set @subjects = @subjects + '[' + @subjname + '],'
set @subjectsselection = @subjectsselection + 'Sum(Isnull([' + @subjname + '],0)) As [' + @subjname + '],'
set @SumSelection = @SumSelection + 'Sum(Isnull([' + @subjname + '],0))+'
set @NoOfSubjects = @NoOfSubjects + 1
FETCH NEXT FROM subject_cursor
INTO @subjname
End
CLOSE subject_cursor;
DEALLOCATE subject_cursor;
select @subjects = LEFT(@subjects, LEN(@subjects) - 1)
select @subjectsselection = LEFT(@subjectsselection, LEN(@subjectsselection) - 1)
select @SumSelection = LEFT(@SumSelection, LEN(@SumSelection) - 1)
print @subjects
print @subjectsselection
print @SumSelection
declare @query nvarchar(4000)
set @query = 'select S.Enroll_Number, pvt.Student_Name, pvt.Course_Id, pvt.Semester, ' + @subjectsselection + ','
set @query = @query + 'Exam_Type,' + @SumSelection + ' As Grand_Total, '
set @query = @query + '(' + @SumSelection + ')' + '/' + convert(varchar(10),@NoOfSubjects) + ' As Avg'
set @query = @query + ' From '
set @query = @query + '(select Enroll_Number, Student_Name, Course_Id, Semester, Subject_Name, MarksObtained, Exam_Type from Exam_Result ) ps '
set @query = @query + ' pivot(sum(MarksObtained) for Subject_Name in (' + @subjects + ')) as pvt'
set @query = @query + ' inner join Stud_Info S on S.Enroll_Number = pvt.Enroll_Number '
set @query = @query + ' where pvt.Course_Id = ''' + @Course_Id + ''' and pvt.Semester = ''' + @Semester + ''''
set @query = @query + ' group by S.Enroll_Number, pvt.Student_Name, pvt.Course_Id, pvt.Semester, Exam_Type'
print @query
exec sp_executesql @query
end
現在、私はo/pのようになっています...
Enroll_Number Student_Name Course_Id Semester Maths English Science Social Smathas total avg
11161 MACK MECH 1 25 22 20 0 0 67 total/all sub
11166 Barden CIV 1 0 0 0 21 0 21 total/all sub
ノート
ここでは、Exam_Resultテーブルにあるすべてのサブジェクトと、Exam_Resultからのすべてのサブ(geでは-67)とすべてのサブジェクトの平均の合計を取得しています。
今の質問は、ユーザーの選択に従って模索することによって結果を表示したいです....たとえば、ユーザーがCourse_Id=MECHとSemester=1のみを表示したい場合、 .... o/pは...である必要があります。
Enroll_No Student_Name Course_ID Semester Maths English Science Type Grand_Total Avg
11161 Mack B Botha MECH 1 25 22 20 internal1 67 66.22
すべてのコースと学期に科目の修正はありません..変更される可能性があります....そしてCourse_Idと学期ごとにグループ化する必要がありますガイダンスとクエリを教えてください私はあなたの答えを実装します....この情報を願っています私のことを説明するのに十分です....すべての答えは大歓迎です...ありがとう