使用SQl Server如何在父子关系中显示数据

Question

Here i have Two Tables like

Master

Id       MasterName
1         Electronic
2         HomeNeeds

ChildTable

Ch_Id      Ch_Name      Master_Id
1            L.G            1
2            Nokia           1
3             WoodLand        2

Please Help me How can i display Data in pArrent child relation Ship Like in Table it should display Like

Id   Product
1    Electronic
  (Within This)
   Lg 
   Nokia

I kNow Joins but its will not helpful for me

Answer 1

Try something like:

SELECT
    M.MasterName,
    STRING_AGG (c.ChildName, ', ') as products,
    M.Id
FROM
    Master AS M
    JOIN
    Child as C
    ON M.Id = C.MasterId
GROUP BY
    M.MasterName,
    M.Id