MSSQL query IN statement for distinct rows

问题

Okay so the problem I'm having is selecting a distinct property on the query below. I understand the reasoning behind why I can't (rownum is unique) but I'm after a solution that will allow me to keep my SQL paging and pull though only the distinct properties from my database. I'm currently using a one to many database relationships that also holds the filtering needed for the results. What I'd be interested in hearing is if there's a better way than using "IN" for my filtering. Cheers guys

CREATE PROCEDURE [dbo].[getActiveProperties]

@PAGENUM  AS INT,
@PERPAGE AS INT,
@SORTBY AS VARCHAR(50),
@FILTERBY AS VARCHAR(200)

AS

DECLARE @query as VARCHAR(2000)

SET @query = N'SELECT *
        FROM (SELECT
            ROW_NUMBER() OVER (ORDER BY ' + @SORTBY + ') AS [rownum],
            dbo.funcSellIdByPropId(T0.id) as SellerId,
            dbo.funcDefaultImage(T0.id, 1) as propImage,
            dbo.funcDefaultImage(T0.id, 2) as propImage2,
            dbo.funcDefaultImage(T0.id, 3) as propImage3,
            dbo.funcDefaultImage(T0.id, 4) as propImage4,
            dbo.funcCountPropertyImages(T0.id) as imageCount,
            dbo.funcGetPropertyTypeListGB(T0.id) as TypeGB,
            dbo.funcGetPropertyTypeListFR(T0.id) as TypeFR,
            dbo.funcGetPropertyEnviListGB(T0.id) as EnviGB,
            dbo.funcGetPropertyEnviListFR(T0.id) as EnviFR,
            dbo.funcGetDepartmentByTown(T0.Town) as Department,
            dbo.funcCheckFeaturedProperty(T0.id) as Featured,
            T0.id, T0.Price, T0.BedRooms, T0.Town, T0.Postcode, T0.Mandate, T0.MinLandArea, T0.Rooms, T0.HabitableSurface, T0.Active, T0.Budget,
            T1.TitleFR, T1.TitleGB, SUBSTRING(T1.DescFR, 0, 300) as DescFR, SUBSTRING(T1.DescGB, 0, 300) as DescGB
        FROM
            PROPERTIES T0
        INNER JOIN
            PROPERTYTRANSLATIONS T1
        ON
            T1.PropertyId = T0.id
        INNER JOIN
            MATRIXPROPENVIRONMENT T2
        ON
            T2.PropertyId = T0.id
        INNER JOIN
            ENVIRONMENT T3
        ON
            T3.id = T2.EnvironmentId
        WHERE
            T0.Deleted = 0 
        AND 
            T0.Active = 1 
        AND
            T3.GB IN (' + @FILTERBY + ')

        ) T
    WHERE
        rownum BETWEEN (' + CONVERT(varchar(4), @PERPAGE * @PAGENUM) + ') AND (' + CONVERT(varchar(4), @PERPAGE * (@PAGENUM + 1)) + ')'

EXEC (@query)

回答1:

Easy. Move rownum from the subquery to the outer query:

SET @query = N'SELECT * FROM (
      SELECT ROW_NUMBER() OVER (ORDER BY ' + @SORTBY + ') AS [rownum],
      *
        FROM (SELECT DISTINCT
            dbo.funcSellIdByPropId(T0.id) as SellerId,
            dbo.funcDefaultImage(T0.id, 1) as propImage,
            dbo.funcDefaultImage(T0.id, 2) as propImage2,
            dbo.funcDefaultImage(T0.id, 3) as propImage3,
            dbo.funcDefaultImage(T0.id, 4) as propImage4,
            dbo.funcCountPropertyImages(T0.id) as imageCount,
            dbo.funcGetPropertyTypeListGB(T0.id) as TypeGB,
            dbo.funcGetPropertyTypeListFR(T0.id) as TypeFR,
            dbo.funcGetPropertyEnviListGB(T0.id) as EnviGB,
            dbo.funcGetPropertyEnviListFR(T0.id) as EnviFR,
            dbo.funcGetDepartmentByTown(T0.Town) as Department,
            dbo.funcCheckFeaturedProperty(T0.id) as Featured,
            T0.id, T0.Price, T0.BedRooms, T0.Town, T0.Postcode, T0.Mandate, T0.MinLandArea, T0.Rooms, T0.HabitableSurface, T0.Active, T0.Budget,
            T1.TitleFR, T1.TitleGB, SUBSTRING(T1.DescFR, 0, 300) as DescFR, SUBSTRING(T1.DescGB, 0, 300) as DescGB
        FROM
            PROPERTIES T0
        INNER JOIN
            PROPERTYTRANSLATIONS T1
        ON
            T1.PropertyId = T0.id
        INNER JOIN
            MATRIXPROPENVIRONMENT T2
        ON
            T2.PropertyId = T0.id
        INNER JOIN
            ENVIRONMENT T3
        ON
            T3.id = T2.EnvironmentId
        WHERE
            T0.Deleted = 0 
        AND 
            T0.Active = 1 
        AND
            T3.GB IN (' + @FILTERBY + ')
        ) T ) TT
    WHERE
        rownum BETWEEN (' + CONVERT(varchar(4), @PERPAGE * @PAGENUM) + ') AND (' + CONVERT(varchar(4), @PERPAGE * (@PAGENUM + 1)) + ')'

来源：https://stackoverflow.com/questions/22797972/mssql-query-in-statement-for-distinct-rows