GROUPING SETS、CUBE、ROLLUP

USE tempdb
IF OBJECT_ID( ‘dbo.T1‘ , ‘U‘
            )IS NOT NULL
    BEGIN
        DROP TABLE dbo.T1;
    END;
GO

CREATE TABLE dbo.T1
(
id INT ,
productName VARCHAR(200) ,
price MONEY ,
num INT ,
amount INT ,
operatedate DATETIME
)
GO

DECLARE @i INT
DECLARE @rand MONEY
DECLARE @date DATETIME
DECLARE @index INT
DECLARE @DateBase INT
SET @date = GETDATE()
SET @i = 1
WHILE ( @i < 15 )
BEGIN
SET @rand = RAND() * 20
SET @index = CAST(RAND() * 3 AS INT)
SET @DateBase = CAST(RAND() * 10 AS INT)

INSERT  INTO dbo.T1 ( id, productName, price, num, amount, operatedate )
VALUES  ( @i, ‘product‘ + CAST (@index AS VARCHAR(10)), @rand, 100,@rand * 100, @date + @DateBase )
SET @i = @i + 1
 END

SELECT  *  FROM dbo.T1
order by operatedate

--ROLLUP
SELECT  CASE WHEN GROUPING(operatedate) = 1 THEN ‘小计‘
               ELSE CONVERT(VARCHAR(10), operatedate, 120)
          END AS 日期, CASE WHEN GROUPING(productName) = 1 THEN ‘小计‘
                          ELSE productName
                     END AS 产品名称, SUM(amount) / SUM(num) AS 平均价格, SUM(num) AS 数量,
          SUM(amount) AS 金额
  FROM    dbo.T1
GROUP BY ROLLUP(operatedate, productName)
ORDER BY  ‘日期‘,‘产品名称‘;

--CUBE
SELECT  CASE WHEN GROUPING(operatedate) = 1 THEN ‘小计‘
              ELSE CONVERT(VARCHAR(10), operatedate, 120)
         END AS 日期, CASE WHEN GROUPING(productName) = 1 THEN ‘小计‘
                         ELSE productName
                    END AS 产品名称, SUM(amount) / SUM(num) AS 平均价格, SUM(num) AS 数量,
         SUM(amount) AS 金额
FROM    dbo.T1
GROUP BY CUBE (operatedate, productName)
ORDER BY  ‘日期‘,‘产品名称‘;