動態 Pivot 按月表

Question

我正在嘗試在 SQL 中創建一個動態 pivot 表，該表將基於月份和年份進行報告。 我做了很多研究，並能夠提出以下查詢：

declare @dynamic nvarchar(max),
@column nvarchar(max);

set @column = N'';
select @column += N'' + datename(month,incurdate) +' '+ datename(year,incurdate) + ',' 
from (select distinct a.incurdate from artable a) as Transpose

select @column = substring(@column,0,len(@column))

set @dynamic = 'select * from
 (
select month, incurdate, dolamount
from artable join dolentry on month = period
) b
pivot(sum(dolamount) for incurdate in (' + @column + ')) as PivotTable'

execute sp_executesql @dynamic

我能夠成功打印@column 變量，但是當我嘗試在@dynamic 變量中設置它時會出現問題。 錯誤消息是'消息 102，級別 15，State 1，第 6 行'1990' 附近的語法不正確。 ' 1990 年是第一個樞軸柱的元年。 任何幫助或提示表示贊賞。 謝謝！

Answer 1

您需要在以下代碼中使用QUOTENAME ：

select @column += N'' + QUOTENAME(datename(month,incurdate) +' '+ datename(year,incurdate)) + ',' 
from (select distinct a.incurdate from artable a) as Transpose

為了像這樣獲得 output ：

[col01], [col02], [col03], ... , [col04]

正如您從文檔中看到的那樣， PIVOT語法要求將旋轉列括在方括號中：

SELECT <non-pivoted column>,  
    [first pivoted column] AS <column name>,  
    [second pivoted column] AS <column name>,  
    ...  
    [last pivoted column] AS <column name>  
FROM  
    (<SELECT query that produces the data>)   
    AS <alias for the source query>  
PIVOT  
(  
    <aggregation function>(<column being aggregated>)  
FOR   
[<column that contains the values that will become column headers>]   
    IN ( [first pivoted column], [second pivoted column],  
    ... [last pivoted column])  
) AS <alias for the pivot table>  
<optional ORDER BY clause>;