How can I change:
<data>
<row>
<a>A</a>
<a>B</a>
<a>C</a>
</row>
</data>
to:
<data>
<row>
<a>Data A</a>
<a>Data B</a>
<a>Data C</a>
</row>
</data>
in SQL? I've seen lots of examples on how to completely replace a value with a static value, but no examples of replacing the value dynamically.
I do not know if it is possible to use the xml in the replace value of statement. But you can do this.
declare @xml xml = '
<data>
<row>
<a>A</a>
<a>B</a>
<a>C</a>
</row>
</data>'
declare @Val1 varchar(10)
declare @Val2 varchar(10)
declare @Val3 varchar(10)
select
@Val1 = 'Data '+r.value('a[1]', 'varchar(1)'),
@Val2 = 'Data '+r.value('a[2]', 'varchar(1)'),
@Val3 = 'Data '+r.value('a[3]', 'varchar(1)')
from @xml.nodes('/data/row') n(r)
set @xml.modify('replace value of (/data/row/a/text())[1] with (sql:variable("@val1"))')
set @xml.modify('replace value of (/data/row/a/text())[2] with (sql:variable("@val2"))')
set @xml.modify('replace value of (/data/row/a/text())[3] with (sql:variable("@val3"))')
Version 2
declare @xml xml = '
<data>
<row>
<a>A</a>
<a>B</a>
<a>C</a>
</row>
<row>
<a>1</a>
<a>2</a>
<a>3</a>
</row>
</data>'
;with cte as
(
select
r.query('.') as Row,
row_number() over(order by (select 0)) as rn
from @xml.nodes('/data/row') n(r)
)
select
(select
'Data '+a.value('.', 'varchar(1)')
from cte as c2
cross apply Row.nodes('row/a') as r(a)
where c1.rn = c2.rn
for xml path('a'), root('row'), type)
from cte as c1
group by rn
for xml path(''), root('data')
I had the same problem, but I found another solution I think ;)
for $n in /data/row
return replace value of node $n with concat('Data',$n/text())
Sincerely
Here is another less-than-ideal way to go about it.
SET @temp.modify('replace value of (/data/row/node()/text())[1] with concat("Data ", (/data/row/node()/text())[1])')
SET @temp.modify('replace value of (/data/row/node()/text())[2] with concat("Data ", (/data/row/node()/text())[2])')
SET @temp.modify('replace value of (/data/row/node()/text())[3] with concat("Data ", (/data/row/node()/text())[3])')
The disadvantage of this method is that you need to a separate statement for each child of row. This only works if you know in advance how many children the row node will have.
