如何根據ID，年份，月份在sqlserver中選擇基於數據的組？

Question

如何獲得基於數據以下格式給出：

Id name  year  month  amount 
1  A  2012  jan  100 
1  A  2012  jan  900 
1  A  2012  jan  300 
1  A  2012  apr  100 
1  A  2012  apr  500 
2  B  2013  may  100 

輸出將在下文提到的形式，如果名稱，年份和月份參數，

Id  name Jan feb mar Apr may jun ...... jan .....may total 
1  A  1300 0 0 600 0 0 ..... 0 ...... 0 1900 
2  B  0  0 0  0 0 0.........0.......100 100 

Answer 1

您需要使用PIVOT獲取引起像你提到的 下面是使用PIVOT

一個例子，你的SQL了Syntex像

SELECT * FROM (SELECT t.id,t.name,t.month,t.amount,(SELECT SUM(t2.amount) FROM dbo.test AS t2 GROUP BY t2.name HAVING t2.name= t.name) AS total FROM dbo.test AS t) as s 
PIVOT 
(
    SUM(Amount) 
    FOR [month] IN (jan, feb, mar, apr, 
    may, jun, jul, aug, sep, oct, nov, dec) 
)AS pivots 

Example

Answer 2

declare @t table (Id INT,name VARCHAR(10),years VARCHAR(10),months VARCHAR(10),amt INT ) 
insert into @t (Id,name,years,months,amt)values (1,'A','2012','jan',100) 
insert into @t (Id,name,years,months,amt)values (2,'A','2012','jan',100) 
insert into @t (Id,name,years,months,amt)values (3,'A','2012','apr',200) 
insert into @t (Id,name,years,months,amt)values (4,'A','2012','apr',100) 
insert into @t (Id,name,years,months,amt)values (5,'B','2013','may',200) 

Select id, 
    name, 
    ISNULL(jan,0) As Jan, 
    ISNULL(feb,0) As FEb, 
    ISNULL(mar,0) As Mar, 
    ISNULL(apr,0)As Apr,ISNULL(JUn,0)As Jun,ISNULL(jul,0)As jul,ISNULL(aug,0)As aug 
     from 
(Select distinct t.ID,t.name,t.years,t.months As Months,t.amt 

     from @t t)t 
PIVOT (SUM(amt)FOR Months IN([jan], 
    [feb], 
    [mar], 
    [apr],[JUn],[jul],[aug]))p 

Answer 3

我認爲這可能需要一個動態的支點？

CREATE TABLE #Data (
    Id INT, 
    name VARCHAR(1), 
    [year] INT, 
    [month] VARCHAR(3), 
    amount INT); 
INSERT INTO #Data VALUES (1, 'A', 2012, 'jan', 100); 
INSERT INTO #Data VALUES (1, 'A', 2012, 'jan', 900); 
INSERT INTO #Data VALUES (1, 'A', 2012, 'jan', 300); 
INSERT INTO #Data VALUES (1, 'A', 2012, 'apr', 100); 
INSERT INTO #Data VALUES (1, 'A', 2012, 'apr', 500); 
INSERT INTO #Data VALUES (2, 'B', 2013, 'may', 100); 
DECLARE @cols VARCHAR(1024); 
SELECT 
    @Cols = STUFF((
    SELECT DISTINCT 
     ',' + QUOTENAME(CONVERT(VARCHAR(4), [year]) + '/' + [month]) 
    FROM 
     #Data 
    FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1 ,1 ,''); 
DECLARE @Query VARCHAR(MAX); 
SELECT @Query = ' 
WITH Aggregated AS (
    SELECT 
     Id, 
     name, 
     CONVERT(VARCHAR(4), [year]) + ''/'' + [month] AS YearMonth, 
     SUM(amount) AS amount 
    FROM 
     #Data 
    GROUP BY 
     Id, 
     name, 
     [year], 
     [month]) 
SELECT 
    * 
FROM 
    Aggregated 
PIVOT (
    SUM(amount) 
    FOR YearMonth IN (' + @cols + ') 
) p;'; 
EXEC (@Query); 

結果是這樣的：

Id name 2012/apr 2012/jan 2013/may 
1 A  600   1300  NULL 
2 B  NULL  NULL  100