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

Question

Example:

    
        Lopez, Michelle MD
        Spanish
        

        

Answer 1

i hope this will help you

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

declare @xml xml;
set @xml = '
    
        Lopez, Michelle MD
        Spanish
        
            49 west point
        
        908-783-0909
        
            CM
        
        
        
    
';

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 Value6 
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 = '
    
        Lopez, Michelle MD
        Spanish
        
            49 west point
        
        908-783-0909
        
            CM
        
        
        
    
';

declare @a  xml;
set @a = N''+@locUrl+'';

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

select @xml;