If you looking to concatenate the values of a column in sql server the below technique helped.
Table NC:
Table NCAssociated:
Final Output:
The below query in SQLServer was helpful:
select nc.NCId,nc.NCNumber,
(
SELECT STRING_AGG(CONVERT(VARCHAR(200), NCAO.AssociatedNCNumber), ', ')
FROM
(
select nca.NCId, NCA.AssociatedNCId, nci.NCNumber AssociatedNCNumber
From dbname.schemaname.NCAssociated nca INNER JOIN dbname.schemaname.NC nci
ON NCi.NCId=NCA.AssociatedNCId
WHERE NCA.NCId= nc.NCId
) NCAO
) AssociatedNCNumber
from dbname.schemaname.NC nc
order by nc.NCId