modify(replace) XML for conditions

Question

I want to replace the value in an element tag, depending on its value, as well as the value of another element(in the same level as said element), both elements being inside

Answer 1

it's not possible to replace multiple values at once in xml in SQL Server, there're a several options:

• use loop and update attributes one by one
• split data into temporary table/table variable, update and then merge into one xml
• use xquery to rebuild xml

I think correct way for you would be loop solution:

select @i = @data.value('count(//Attribute[DataType="Float" and Format="n0"]/Format)', 'int')

while @i > 0
begin
    set @data.modify('
         replace value of
             (//Attribute[DataType="Float" and Format="n0"]/Format/text())[1]
         with "f2"
    ')

    set @i = @i - 1
end

sql fiddle demo

---

If your xml contains namepaces, simplest way to update I found would be to declare default namespace:

;with xmlnamespaces(default 'schemas.microsoft.com/sqlserver/2004/10/semanticmodeling')
select @i = @xml.value('count(//Attribute[DataType="Float" and Format="n0"]/Format)', 'int')

while @i > 0
begin
    set @xml.modify('
         declare default element namespace "schemas.microsoft.com/sqlserver/2004/10/semanticmodeling";
         replace value of
             (//Attribute[DataType="Float" and Format="n0"]/Format/text())[1]
         with "f2"
    ')

    set @i = @i - 1
end
select @xml