XML output in SQL help needed - sql-server

Question

Hi I have the following code in SQL that outputs xml between 2 tables. The output is 90% correct but if possible add to the output and then also remove some of the output text.
I am not sure if SQL has the ability to code a type of a element in the output. Please see the code below with the output. Currently if possible I would like to make 2 changes to my current output. The changes are list at the end of the port
DECLARE #ID_Rechnung int = 1978,
#XMLData xml;
WITH XMLNAMESPACES ('?xml version="1.0" encoding="UTF-8"?' as ext)
SELECT
#XMLData = xmldat.xmldataCol
FROM
(
SELECT (
SELECT
-- HIER XML Daten generieren
[InvoiceHeader].[InvoiceDate] AS 'invoice-date',
([InvoiceHeader].[InvoiceNumber]) AS 'invoice-number',
cast(replace([InvoiceHeader].[GrossValue],' ','') as decimal(18,2)) AS 'gross-total',
cast(replace([InvoiceHeader].[NetValue],' ','') as decimal(18,2)) AS 'amount-due',
[InvoiceHeader].[VatRate] AS 'tax-rate',
cast(replace([InvoiceHeader].[VatValue],' ','') as decimal(18,2)) AS 'tax-amount',
[ImagePath] AS 'image-scan-url',
[InvoiceType] AS 'document-type',
[LegalEntityVATNo] AS 'account-type/id',
[LegalEntityName] AS 'account-type/name',
[SupplierCode] as 'supplier/number',
[Currency] as 'currency/code',
(
SELECT rtrim([InvoiceLines].[LineNumber]) AS [order-line-num]
, [PONumber] as [po-number],
CAST([InvoiceLines].[UnitPrice] AS decimal(18,2)) AS Price ,
[Quantity] as quantity,
[TaxAmount] as [tax-amount],
[LineTotal] as [total],
[Decsription] as description
FROM [InvoiceLines] WHERE [InvoiceLines].[DOCID] = #id_Rechnung
FOR XML PATH('Invoice-line'), ROOT('invoice-lines'), TYPE
)
FROM [InvoiceHeader]
WHERE [InvoiceHeader].[DOCID] = #ID_Rechnung
FOR XML PATH(''), TYPE, ROOT('invoice-header')
) AS xmldataCol
) AS xmldat;
SELECT #XMLData
.query('<invoice-header>
{
for $x in /invoice-header/*[local-name()!="root"]
return $x,
for $x in /invoice-header/root/r
return <invoice-lines>/<invoice-line>{$x/*}</invoice-line></invoice-lines>
}
</invoice-header>');
Output:
<invoice-header>
<invoice-date>20180509</invoice-date>
<invoice-number>1075440</invoice-number>
<gross-total>1376.67</gross-total>
<amount-due>1197.10</amount-due>
<tax-rate>15.00%</tax-rate>
<tax-amount>179.57</tax-amount>
<image-scan-url>\\INTEL-SQL01\Attachment\2018-06-20\7e0dd165-81d6-445a-95d1-8aac686d44ed\f9a1179c-2a54-480e-b97a-ce6ac7327ae0.000</image-scan-url>
<account-type>
<id>4010112052</id>
<name>CONSOLIDATEDPOWERPROJECTS</name>
</account-type>
<supplier>
<number>12345</number>
</supplier>
<currency>
<code>ZAR</code>
</currency>
<invoice-lines xmlns:ext="?xml version="1.0" encoding="UTF-8"?">
<Invoice-line>
<order-line-num>4</order-line-num>
<po-number>120934861</po-number>
<Price>50.00</Price>
<quantity>1.000000</quantity>
<tax-amount>7.500000</tax-amount>
<total>50.00</total>
<description>Test1</description>
</Invoice-line>
<Invoice-line>
<order-line-num>2</order-line-num>
<po-number>120934861</po-number>
<Price>10.00</Price>
<quantity>2.000000</quantity>
<tax-amount>4.500000</tax-amount>
<total>20.00</total>
<description>Test2</description>
</Invoice-line>
</invoice-lines>
</invoice-header>
1.How do I get rid of the following xmlns:ext="?xml version="1.0" encoding="UTF-8&in the line: "<invoice-lines xmlns:ext="?xml version="1.0" encoding="UTF-8"?">"
How would I code "<tax-amount>7.500000</tax-amount> to get the output": "<tax-amount type="decimal">7.500000</tax-amount>"

Answer 1

Without a minimal reproducible example it is not possible to give you a full working answer.
(1) As #JeroenMostert already pointed out, the
'?xml version="1.0" encoding="UTF-8"?'
is an XML prolog declaration. Just delete the following line:
WITH XMLNAMESPACES ('?xml version="1.0" encoding="UTF-8"?' as ext)
(2) Here is a conceptual example how to add an attribute to an XML element. What is important here is a sequential order of adding, i.e. attribute shall be first, element itself is 2nd.
SQL
DECLARE #tbl TABLE (ID INT IDENTITY PRIMARY KEY, [tax-amount] VARCHAR(20));
INSERT INTO #tbl ([tax-amount]) VALUES
(N'7.500000'),
(N'18.000000');
SELECT
'decimal' AS [tax-amount/#type]
, [tax-amount]
FROM #tbl
FOR XML PATH('r'), TYPE, ROOT('root');
Output
<root>
<r>
<tax-amount type="decimal">7.500000</tax-amount>
</r>
<r>
<tax-amount type="decimal">18.000000</tax-amount>
</r>
</root>