SQL Server存储过程

Question

I want it to count then if @intcount > 0 it should show data or else no data found, but when I execute it gives me 'no data found' regardless, what am I doing wrong?

@FiscalYear int,
@SchoolID int,
@Status int

AS
BEGIN

SET NOCOUNT ON;

declare @sqlstr varchar(2000)
declare @intCount int
set @intCount = 0

set @sqlstr = 'Select @intCount = Count(*)
              From PrivateSchool left outer join Attachment on  Attachment.PrivateSchoolID = PrivateSchool.PrivateSchoolID
              inner join FiscalYearPrivateSchool fp ON  fp.PrivateSchoolID = PrivateSchool.PrivateSchoolID 
              Where (FiscalYear = '+convert(varchar, @FiscalYear)+') AND (PrivateSchool.IsActive = 1)'

 IF (@SchoolID != -1)
    SET @sqlstr = @sqlstr + ' AND SchoolID ='+ convert(varchar, @SchoolID)

 IF (@Status = -1)
    SET @sqlstr = @sqlstr + ' AND PrivateSchool.PrivateSchoolID = PrivateSchool.PrivateSchoolID'

 Else IF (@Status = 1)
    SET @sqlstr = @sqlstr + ' AND Attachment.PrivateSchoolID = PrivateSchool.PrivateSchoolID'
 Else 
    SET @sqlstr = @sqlstr + ' AND Attachment.PrivateSchoolID is Null'


 If (@intCount > 0)
 BEGIN
 set @sqlstr=   'Select SchoolName as School, 
 (Case when Attachment.PrivateSchoolID = PrivateSchool.PrivateSchoolID THEN ''Uploaded''    
  ELSE ''Not Uploaded'' END) AS Status,
  COUNT(Attachment.PrivateSchoolID) AS [Count] 
              From PrivateSchool left outer join Attachment on  Attachment.PrivateSchoolID = PrivateSchool.PrivateSchoolID
              inner join FiscalYearPrivateSchool fp ON  fp.PrivateSchoolID = PrivateSchool.PrivateSchoolID 
              Where (FiscalYear = '+convert(varchar, @FiscalYear)+') AND (PrivateSchool.IsActive = 1)'



 IF (@SchoolID != -1)
    SET @sqlstr = @sqlstr + ' AND SchoolID ='+ convert(varchar, @SchoolID)

 IF (@Status = -1)
    SET @sqlstr = @sqlstr + ' AND PrivateSchool.PrivateSchoolID = PrivateSchool.PrivateSchoolID'

 Else IF (@Status = 1)
    SET @sqlstr = @sqlstr + ' AND Attachment.PrivateSchoolID = PrivateSchool.PrivateSchoolID'
 Else 
    SET @sqlstr = @sqlstr + ' AND Attachment.PrivateSchoolID is Null'

    SET @sqlstr = @sqlstr + ' Group by SchoolName, Attachment.PrivateSchoolID, PrivateSchool.PrivateSchoolID'
    SET @sqlstr = @sqlstr + ' Order By SchoolName'
EXEC(@sqlstr)
 END
 ELSE
 Select 'No Data Found' as 'FileUpload'
 END

Answer 1

You need:

EXEC sp_executesql @sqlstr, N'@intCount INT OUTPUT', @intCount = @intCount OUTPUT;

IF (@intCount > 0)
BEGIN
    ....
END

You'll also need to make @sqlstr NVARCHAR(2000) and add set it to N'SELECT ...' as opposed to 'SELECT ...' - that leading N can be important.

Answer 2

The problem is:

declare @intCount int
set @intCount = 0
...
<a bunch of code where @intcount doesn't change>
If (@intCount > 0)

It's always going to be 0.

Answer 3

Your issue is one of scope. The EXEC(@sqlstr) command doesn't have access to the @intcount variable in your stored procedure. I would bet if you ran this code in a query window, it would tell you to declare @intcount.

Listen to YUCK and rewrite this to avoid dynamic SQL, and then your SELECT will be able to set the @intcount variable.