SQL Server：將列名稱指定爲屬性，並將節點值指定爲XML

Question

我需要從SQL Server返回XML中包含空格的列別名。 XML需要是這樣的：

<Records> 
    <Record> 
     <Field FieldName="PURCHASE_DETAIL_ID">31320</Field> 
     <Field FieldName="ORDER_ID">6507</Field> 
     <Field FieldName="PRODUCT_ORDER">1</Field> 
    </Record> 
</Records> 

我的表如下所示：

PURCHASE_DETAIL_ID | ORDER_ID | PRODUCT_ORDER 
---------------------------------------------------- 
    31320    6507    1 

我想使用XML提取FOR XML方法。

我嘗試了以下，它適用於單列，但不適用於多個。

SELECT 
    'PURCHASE_DETAIL_ID' AS [Field/@FieldName], 
    'GOLI' + RTRIM(CONVERT(VARCHAR(10), ol.ID)) AS [Field], 
    'ORDER_ID' AS [Field/@FieldName], 
    o.ID AS [Field], 
    'PRODUCT_ID' AS [Field/@FieldName], 
    P.ID AS [Field] 
FROM ... 
WHERE ... 
FOR XML PATH('Record'), ROOT('Records') 

Answer 1

這是你必須做的事情......

SELECT 
    'PURCHASE_DETAIL_ID' AS [Field/@FieldName], 
    'GOLI' + RTRIM(CONVERT(VARCHAR(10), ol.ID)) AS [Field], 
'', 
    'ORDER_ID' AS [Field/@FieldName], 
    o.ID AS [Field], 
'', 
    'PRODUCT_ID' AS [Field/@FieldName], 
    P.ID AS [Field] 
FROM ... 
WHERE ... 
FOR XML PATH('Record'), ROOT('Records') 

Answer 2

您可以嘗試使用如下XML節點值：

declare @xml xml = 
'<Records> 
    <Record> 
     <Field FieldName="PURCHASE_DETAIL_ID">31320</Field> 
     <Field FieldName="ORDER_ID">6507</Field> 
     <Field FieldName="PRODUCT_ORDER">1</Field> 
    </Record> 
</Records>' 

;with cte as (
SELECT T.c.value('@FieldName', 'nvarchar(max)') AS result, T.c.value('.','int') as val 
FROM @xml.nodes('/Records/Record/Field') T(c) 
) 
select * from cte 
pivot (max(val) for result in ([PURCHASE_DETAIL_ID],[ORDER_ID],[PRODUCT_ORDER])) p 

輸出將是這樣的：

如果你想在一排的結果明智的你可以單獨在cte內執行查詢

SELECT T.c.value('@FieldName', 'nvarchar(max)') AS result, T.c.value('.','int') as val 
FROM @xml.nodes('/Records/Record/Field') T(c) 

這將工作