如何在SQL Server中提取记录之前对总数进行计数

Question

i am working on windows Form application and wanted to perform Paging in DataGridView so i wrote a query for that

Select  DISTINCT  TOP(1000)
        TblStudentBioData.RegNo
    , Coalesce(TblStudentBioData.First_NameUr + SPACE(1) + 
      TblStudentBioData.Middle_NameUr + SPACE(1),TblStudentBioData.First_NameUr)
    + TblStudentBioData.Last_NameUr AS Name
    , TblStudentBioData.Father_NameUr
    , Coalesce(Ay.AcademicYearName,N'+@InCaseNull+') As AcademicYearName
    , Coalesce(Smst.SemName,N'+@InCaseNull+') As SemName
    , Coalesce(Colg.CollegeName,N'+@InCaseNull+') As CollegeName
    , Coalesce(CID.ClassName,N'+@InCaseNull+') As ClassName
    , TblImages.Images
    , TblStudentBioData.Student_ID
    , TblImages.ImageId
    , Ay.AcademicYearId
    , Smst.SemesterId
    , TblClassSchedule.ClassSchId


FROM TblStudentBioData
        INNER JOIN TBLCFGSEX AS sex
                    ON TblStudentBioData.CfgSexId = sex.CfgSexId
        LEFT JOIN TBLMARITALSTATUS ms
                    ON TblStudentBioData.MaritalStatusId = ms.MaritalStatusId
        INNER JOIN TblImages
                    ON TblStudentBioData.ImageId = TblImages.ImageId
        LEFT JOIN TBLBLOODGROUP BG
                    ON TblStudentBioData.BloodID = BG.BloodId

        LEFT JOIN TblStudentDetail
                    ON (TblStudentBioData.Student_ID = TblStudentDetail.Student_ID)
        LEFT JOIN TblStudentSubAss
                    ON TblStudentDetail.StudentDetailID = TblStudentSubAss.StudentDetailID
        LEFT JOIN TblClassSchedule
                    ON TblStudentDetail.CLassSchID = TblClassSchedule.ClassSchID

        LEFT JOIN TblSubAss
                    ON TblSubAss.SubAssId = TblStudentSubAss.SubAssId
        LEFT JOIN TblClass AS CID
                    ON TblClassSchedule.ClassID = CID.ClassID
        LEFT JOIN TBLCOLLEGE Colg
                    ON CID.CollegeId = Colg.CollegeID
        LEFT JOIN TblSemAssigning SA
                    ON TblClassSchedule.SemAssId = SA.SemAssId
        LEFT JOIN TblAcademicYear AY
                    ON SA.AcademicYearId = AY.AcademicYearId
        LEFT JOIN TblSemester Smst
                    ON Smst.SemesterId = SA.SemesterId

This Query Return me more than 28K rows but for paging i want only 1000 rows and total records which is 28K i will be fetching records 1000 wise. Any Idea how can i do this ?

Note:

This query takes more then 20 seconds to execute and i wanted a solution which does not increase executing time.

Answer 1

If you only hava 1:1 detail-Tables in your query you could first do a selec count() on your primary key-field of your primary table. that should only last very few milliseconds