?? 6.3.5 特殊的交叉報表處理示例.sql
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CREATE TABLE tb(Item varchar(10),Color varchar(10),Quantity int)
INSERT tb SELECT 'Table','Blue', 124
UNION ALL SELECT 'Table','Red', 60
UNION ALL SELECT 'Table','Red', 99
UNION ALL SELECT 'Table','Green', 120
UNION ALL SELECT 'Table','Green', 110
UNION ALL SELECT 'Chair','Yellow',101
UNION ALL SELECT 'Chair','Yellow',131
UNION ALL SELECT 'Chair','Red', 90
UNION ALL SELECT 'Chair','White', 55
GO
--生成分組信息臨時表
SELECT Item,Color,id=0
INTO # FROM tb
GROUP BY Item,Color
--生成各組Item的Color序號
DECLARE @Item varchar(10),@i varchar(10)
UPDATE # SET
@i=CASE WHEN @Item=Item THEN @i+1 ELSE 1 END,
id=@i,@Item=Item
--生成交叉數(shù)據(jù)報表處理語句
DECLARE @s1 nvarchar(4000),@s2 nvarchar(4000),@fd nvarchar(4000)
SELECT @s1='',@s2='',@fd='',@i=MAX(id)
FROM #
GROUP BY Item
WHILE @i>0
SELECT
@fd=','+QUOTENAME('col'+@i)+'='+QUOTENAME(@i)+@fd,
@s1=@s1+','+QUOTENAME(@i)
+'=MAX(CASE id WHEN '+@i
+' THEN Color END)',
@s2=@s2+','+QUOTENAME(@i)
+'=CAST(SUM(CASE b.id WHEN '+@i
+' THEN a.Quantity END) as varchar)',
@i=@i-1
EXEC('
SELECT Item=Item'+@fd+' FROM(
SELECT Item'+@s1+',s=0 FROM # GROUP BY Item
UNION ALL
SELECT a.Item'+@s2+',s=1
FROM tb a,# b
WHERE a.Item=b.Item AND a.Color=b.Color
GROUP BY a.Item
)a ORDER BY Item,s')
DROP TABLE #
/*--結(jié)果
Item col0 col1 col2
------------- ------------------- ----------------- ---------------
Chair Red White Yellow
Chair 90 55 232
Table Blue Green Red
Table 124 230 159
--*/
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