我正在将参数从 asp.net webform 传递给存储过程。
然而,对于一个特定的参数组合,单个参数似乎被忽略了。
我传递的导致问题的参数如下:
EXEC @return_value = [dbo].[spProgressCohorts]
@StuYear = N'10',
@DataCollection = N'March 2013 Teacher Assessments',
@SubjectName = N'English',
@TeachingGroup = N'Select All',
@Subgroup = N'Select All',
@KS2 = '',
@Result = ''
当我使用这些参数运行存储过程时,结果返回就好像 @Result 变量被忽略了一样。
存储过程返回的结果是(包含 ks2en 和 result 列以供参考):
surname forename ks2en result
El Hajj Zeinab D
Grzelak Marlena F+
Sage Nigel
但是,当我运行以下查询时,我只得到了 Nigel Sage 的记录(正如预期的那样,这是存储过程应该返回的):
select surname, forename, ks2en, result
from student join subject on subject.upn=student.upn
where datacollection='March 2013 Teacher Assessments' and stuyear='10' and name='english' and result='' and ks2en=''
我的存储过程很庞大,所以我只包含特定于上述参数的代码:
ALTER PROCEDURE [dbo].[spProgressCohorts]
@StuYear varchar(2),
@DataCollection varchar(100),
@SubjectName varchar(100),
@TeachingGroup varchar(30),
@Subgroup varchar(10),
@Result varchar(4),
@KS2 varchar(4)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
--interfering with SELECT statements.
SET NOCOUNT ON;
SELECT Forename + ' ' + Surname
FROM student
JOIN subject
ON subject.upn = student.upn
WHERE
(@StuYear = [stuyear]
AND @TeachingGroup = 'Select All'
AND [DataCollection] = @DataCollection
AND [Name] = @SubjectName
AND @Subgroup='Select All'
AND @KS2 = CASE @subjectName WHEN 'English' THEN KS2en WHEN 'Mathematics' THEN KS2ma ELSE KS2av END
AND [Result] like @Result + '%')
OR
(@StuYear = [stuyear]
AND @TeachingGroup Not Like 'Select All'
AND [DataCollection] = @DataCollection
AND [Name] = @SubjectName
AND [TeachingGroup] = @TeachingGroup
AND @Subgroup='Select All'
AND @KS2 = CASE @subjectName WHEN 'English' THEN KS2en WHEN 'Mathematics' THEN KS2ma ELSE KS2av END
AND [Result] like @Result + '%')
ORDER BY surname, forename