How to use IF/ELSE statement to update or create new xml node entry in Sql

Question

Example:

    
        Lopez, Michelle MD
        Spanish
        

        

Answer 1

Try to delete the anchor element first and then insert the new one. It does not matter if it is there or not for the delete statement. I also provided a better way to build your new anchor element. It takes care of creating entities for characters like &.

-- Delete the anchor node from the XML
set @xml.modify('delete /root/StartOne/Value6/a');

-- Build the XML for the new anchor node
set @a = (
         select @locTitle as 'a/@title',
                @locUrl as 'a/@href',
                '_blank' as 'a/@target',
                @locTitle as 'a'
         for xml path(''), type
         );

-- Insert the new anchor node
set @xml.modify('insert sql:variable("@a") into (/root/StartOne/Value6)[1]');

Answer 2

i hope this will help you

Declare @locUrl varchar(255);
Set @locUrl = 'xyz.aspx?id=' + '444' + '';

declare @xml xml;
set @xml = '<root>
    <StartOne>
        <Value1>Lopez, Michelle MD</Value1>
        <Value2>Spanish</Value2>
        <Value3>
            <a title="49 west point" href="myloc.aspx?id=56" target="_blank">49 west point</a>
        </Value3>
        <Value4>908-783-0909</Value4>
        <Value5>
            <a title="CM" href="myspec.aspx?id=78" target="_blank">CM</a>
        </Value5>
        <Value6>
        </Value6>
    </StartOne>
</root>';

declare @chk nvarchar(max);
-- here implementing for Value6
set @chk = (select 
C.value('(Value6/a/text())[1]', 'nvarchar(max)') col
from
@xml.nodes('/root/StartOne') as X(C))
-- make sure here 
select @chk;


if @chk is null
begin
-- INSERT
SET @xml.modify('       
insert <a title="Value6" href="Value6.aspx?id=78" target="_blank">Value6</a> 
into (/root/StartOne/Value6)[1]') 
end

else
begin
-- UPDATE
Set @xml.modify('replace value of (/root/StartOne/Value6/a/@href)[1] with sql:variable("@locUrl")');
end

select @xml

UPDATE: after your below comment this is the way to update dynamically

Declare @locUrl nvarchar(255);
Set @locUrl = 'xyz.aspx?id=' + '444' + '';

declare @xml xml;
set @xml = '<root>
    <StartOne>
        <Value1>Lopez, Michelle MD</Value1>
        <Value2>Spanish</Value2>
        <Value3>
            <a title="49 west point" href="myloc.aspx?id=56" target="_blank">49 west point</a>
        </Value3>
        <Value4>908-783-0909</Value4>
        <Value5>
            <a title="CM" href="myspec.aspx?id=78" target="_blank">CM</a>
        </Value5>
        <Value6>
        </Value6>
    </StartOne>
</root>';

declare @a  xml;
set @a = N'<a title="' + @locUrl+ '" href="' +@locUrl+ '" target="_blank">'+@locUrl+'</a>';

SET @xml.modify
('insert sql:variable("@a")
into (/root/StartOne/Value6)[1]');

select @xml;

Answer 3

You might want to just try replacing:

set @locAnchor = ('<a href="theloc.aspx?id=' + 
@locID + '" title="' + @locTitle + '">' + 
@locTitle + '</a>');

with:

SELECT @locAnchor = (SELECT 'theloc.aspx?id=' + @locID AS 'Value6/a/@href',
@locTitle AS 'Value6/a/@title',
@locTitle AS 'Value6/a'
FOR XML PATH (''))

instead of trying to dynamically create the XML