Question

I’d like to get all tags that match a given id where:

select tag where id = 101 //returns 4 rows
soup
nuts
juice
milk

Only now, i’d like to use that as a subquery –

select idList, (select tag where id = 101) itemsOnList, shopper from assignedLists

becomes:

10 | soup,nuts,juice,milk | Mom

Answer 1

This is actually a pretty tricky thing to do believe or not.
The best reference I have seen for doing this is here. The following query was taken from an example in that article. There are more options.

select
  idList,
  (
    select name + ','
    from tag
    where id = 101
    for xml path('')
  ) as itemsOnList,
  shopper
from
  assignedLists