XQuery [value()]: 'value()' requires a singleton (or empty sequence), found operand of type 'xdt:untypedAtomic *'

Question

I\'m trying to insert rows into a table using a select from XML. I think I\'m close. Where am I going wrong?

declare @xmldata xml;
set @xmldata = \'

        

Answer 1

Try this!
query() then value()
run this in SQL Server and 100% worked
put a dot (.) first then the child tag.
PurchaseDetail tag exists 2 times so the dot (.) replaces the first and the second tag.
The dot can prevent using of [1] on XQuery.
The dot represents the first and the second PurchaseDetail tags.

INSERT INTO PurchaseDetails(Upc, Quantity, PurchaseDate, PurchaseCity, PurchaseState)
SELECT col.query('./Upc').value('.', 'char(11)'),
    col.query('./Quantity').value('.', 'int'),
    col.query('./PurchaseDate').value('.', 'varchar(7)'),
    col.query('./PurchaseCity').value('.', 'varchar(50)'),
    col.query('./PurchaseState').value('.', 'char(2)')
FROM @xmlData.nodes('/Database/PurchaseDetails/PurchaseDetail') as ref(col)

It is more simplified query so far.
See if it works