Difficulty in writing Stored Proc to fetch data fo

问题:

I am using the following SQL Procedure for getting data to use for pagination in JqGrid in my web Application.

ALTER PROCEDURE [dbo].[NewStoredProc] 
(
    @skip int,
    @pageSize int,
    @OrderBy Varchar(20),
    @OrderByDirection Varchar(10)
 )

AS
BEGIN
    DECLARE @records int;
    SET NOCOUNT ON;
    SET @records =(select count(*) from Data where Status='A');

    IF @skip <= 0
        SELECT TOP (@pageSize) * from Data where Status='A' 
        ORDER BY CASE WHEN @OrderBy='Column1' AND @OrderByDirection='D' THEN Column1 END DESC ,CASE WHEN @OrderBy='Column1' AND @OrderByDirection !='D'THEN Column1 END,
                 CASE WHEN @OrderBy='Column2' AND   @OrderByDirection='D' THEN Column2 END DESC ,CASE WHEN @OrderBy='Column2' AND @OrderByDirection !='D'THEN Column2 END,
                 CASE WHEN @OrderBy='Column3' AND   @OrderByDirection='D' THEN Column3 END DESC ,CASE WHEN @OrderBy='Column3' AND @OrderByDirection !='D'THEN Column3 END

    ELSE
        WITH GetAll AS (
           SELECT  * from Data where Status='A')
        ,GetFirst AS (
            SELECT TOP (@skip) *
            FROM GetAll
        ),GetNext AS (
            SELECT TOP (@pageSize) nt.*
            FROM GetAll AS nt
                LEFT OUTER JOIN GetFirst AS f ON f.Col1=nt.Col1
            WHERE f.Col1 IS  NULL)

        SELECT * FROM GetNext;
    RETURN @records;
END

Here, the Problem is i can not use OrderBy in WITH Clause. But, i need to get the records only after sorting.Is there any way we can do this..

Simply to say.. how to implement order by for GetAll data

回答1:

It seems to my that you can fix the code by usage of OrderBy in GetFirst and GetNext part of the WITH Clause, but not in the GetAll part. The corresponding code will be about the following

ALTER PROCEDURE [dbo].[NewStoredProc] 
(
    @skip int,
    @pageSize int,
    @OrderBy Varchar(20),
    @OrderByDirection Varchar(10)
 )

AS
BEGIN
    DECLARE @records int;
    SET NOCOUNT ON;
    SET @records =(select count(*) from Data where Status='A');

    IF @skip <= 0
        SELECT TOP (@pageSize) * from Data where Status='A' 
        ORDER BY CASE WHEN @OrderBy='Column1' AND @OrderByDirection='D'
                      THEN Column1
                 END DESC,
                 CASE WHEN @OrderBy='Column1' AND @OrderByDirection !='D'
                      THEN Column1
                 END,
                 CASE WHEN @OrderBy='Column2' AND @OrderByDirection='D'
                      THEN Column2
                 END DESC,
                 CASE WHEN @OrderBy='Column2' AND @OrderByDirection !='D'
                      THEN Column2
                 END,
                 CASE WHEN @OrderBy='Column3' AND @OrderByDirection='D'
                      THEN Column3
                 END DESC,
                 CASE WHEN @OrderBy='Column3' AND @OrderByDirection !='D'
                      THEN Column3
                 END
    ELSE
        WITH GetAll AS (
            SELECT * from Data where Status='A'
        ),GetFirst AS (
            SELECT TOP (@skip) *
            FROM GetAll
            ORDER BY CASE WHEN @OrderBy='Column1' AND @OrderByDirection='D'
                          THEN Column1
                     END DESC,
                     CASE WHEN @OrderBy='Column1' AND @OrderByDirection !='D'
                          THEN Column1
                     END,
                     CASE WHEN @OrderBy='Column2' AND @OrderByDirection='D'
                          THEN Column2
                     END DESC,
                     CASE WHEN @OrderBy='Column2' AND @OrderByDirection !='D'
                          THEN Column2
                     END,
                     CASE WHEN @OrderBy='Column3' AND @OrderByDirection='D'
                          THEN Column3
                     END DESC,
                     CASE WHEN @OrderBy='Column3' AND @OrderByDirection !='D'
                          THEN Column3
                     END
        ),GetNext AS (
            SELECT TOP (@pageSize) nt.*
            FROM GetAll AS nt
                LEFT OUTER JOIN GetFirst AS f ON f.Col1=nt.Col1
            WHERE f.Col1 IS  NULL
            ORDER BY CASE WHEN @OrderBy='Column1' AND @OrderByDirection='D'
                          THEN nt.Column1
                     END DESC,
                     CASE WHEN @OrderBy='Column1' AND @OrderByDirection !='D'
                          THEN nt.Column1
                     END,
                     CASE WHEN @OrderBy='Column2' AND @OrderByDirection='D'
                          THEN nt.Column2
                     END DESC,
                     CASE WHEN @OrderBy='Column2' AND @OrderByDirection !='D'
                          THEN nt.Column2
                     END,
                     CASE WHEN @OrderBy='Column3' AND @OrderByDirection='D'
                          THEN nt.Column3
                     END DESC,
                     CASE WHEN @OrderBy='Column3' AND @OrderByDirection !='D'
                          THEN nt.Column3
                     END
        )  
        SELECT * FROM GetNext

    RETURN @records;
END