Sql Xquery How to Replace text in Update Query

Question

Table is named as MasterTable

Columns

ID type BIGINT,

Name type VARCHAR(200) (stores

Answer 1

You can not assign from a xml.modify. Modify works on the variable/column directly. You can also not use modify on a cast.

You can extract the name to a xml variable, modify the xml and then put it back to the table.

declare @str varchar(200) = 'Test'
declare @xml xml

select @xml = cast(Name as xml)
from MasterTable
where ID = 18

set @xml.modify('replace value of (en-US/text())[1] with sql:variable("@Str")')

update MasterTable
set Name = cast(@xml as varchar(200))
where ID = 18

If you need this to work over more than one row at a time you can use a table variable with columns id and name where data type for name is xml instead of the @xml variable.

declare @str varchar(200) = 'Test Text'
declare @T table (ID int, Name xml)

insert into @T
select ID, cast(Name as xml)
from MasterTable
where Name is not null

update @T
set Name.modify('replace value of (en-US/text())[1] with sql:variable("@Str")')

update MasterTable
set Name = cast(T.Name as varchar(200))
from @T as T
where MasterTable.ID = T.ID