分頁

方式一：

SET NOCOUNT ON;
USE tempdb;
GO
IF OBJECT_ID('dbo.Sales') IS NOT NULL
  DROP TABLE dbo.Sales;
GO
CREATE TABLE dbo.Sales
(
  empid VARCHAR(10) NOT NULL PRIMARY KEY,
  mgrid VARCHAR(10) NOT NULL,
  qty   INT         NOT NULL
);

INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('A', 'Z', 300);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('B', 'X', 100);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('C', 'X', 200);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('D', 'Y', 200);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('E', 'Z', 250);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('F', 'Z', 300);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('G', 'X', 100);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('H', 'Y', 150);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('I', 'X', 250);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('J', 'Z', 100);
INSERT INTO dbo.Sales(empid, mgrid, qty) VALUES('K', 'Y', 200);

CREATE INDEX idx_qty_empid ON dbo.Sales(qty, empid);
CREATE INDEX idx_mgrid_qty_empid ON dbo.Sales(mgrid, qty, empid);
GO

-- Querying the Sales table
SELECT * FROM dbo.Sales;



DECLARE @pagesize AS INT, @pagenum AS INT;
SET @pagesize = 5;
SET @pagenum = 2;

WITH SalesCTE AS
(
  SELECT ROW_NUMBER() OVER(ORDER BY qty, empid DESC) AS rownum,
    empid, mgrid, qty
  FROM dbo.Sales
)
SELECT rownum, empid, mgrid, qty
FROM SalesCTE
WHERE rownum > @pagesize * (@pagenum-1)
  AND rownum <= @pagesize * @pagenum
ORDER BY rownum;
GO

 

方式二：

創建臨時表和聚集索引

-- Creating a table with row numbers
IF OBJECT_ID('tempdb..#SalesRN') IS NOT NULL
  DROP TABLE #SalesRN;
GO
SELECT ROW_NUMBER() OVER(ORDER BY qty, empid) AS rownum,
  empid, mgrid, qty
INTO #SalesRN
FROM dbo.Sales;

CREATE UNIQUE CLUSTERED INDEX idx_rn ON #SalesRN(rownum);
GO

-- Run for each page request
DECLARE @pagesize AS INT, @pagenum AS INT;
SET @pagesize = 5;
SET @pagenum = 2;

SELECT rownum, empid, mgrid, qty
FROM #SalesRN
WHERE rownum BETWEEN @pagesize * (@pagenum-1) + 1
                 AND @pagesize * @pagenum
ORDER BY rownum;
GO
-- Cleanup
DROP TABLE #SalesRN;
GO