Question

This is a sample query

select *
from tablename
where tableid in (<sub query>);

The <sub query> here returns null or a string of pattern 'id1','id2','id3'

My <sub query> is something like:

select xml_data.value('(/Node/SubNode)[1]', 'varchar(max)'))
from tablename
where tableid = '9944169f-95a6-4570-89d7-b57a3fe1b693'

The problem :
My sub query returns proper data ('id1','id2','id3') but the parent query considers the complete result as one single string and hence returns 0 rows always.

How can I tell SQL Server not to escape single quotes present in the result of my sub-query?

Answer 1

It’s not clear if your subquery is applying to the same table as the first query, but this should show you the general direction

declare @x xml = '<Node><SubNode>t1</SubNode><SubNode>t2</SubNode></Node>'

declare @t  table (v varchar(20))
insert @t values ('t1'),('t3')

select table1.*
from
    @t table1
        inner join 
    @x.nodes('/Node/SubNode') t(x)
        on table1.v = t.x.value('.','varchar(100)')