unify multiple fields with the same ID into one field SQL Linq

Question

I have these data, which look like this:

   ID      name
------------------
   1       Judith
   1       John
   1       Tim
   2       Anna
   2       Tyler

And I need to unify that table, having an output like this:

   ID      name
-------------------------------
   1       Judith, John, Tim
   2       Anna, Tyler

How can I do a Linq query in C# to get that result? (Or at least in SQL...)

Thank you!

Answer 1

in T-SQL you can use STRING_AGG

select id, STRING_AGG(name,',') 
from users GROUP BY id