Oracle Query Syntax Assist

I have a one to many oracle table where I have the following:

CustomerID   CustomerName
1                      ABC
2                      DEF

CustomerID        GroupID
1                            1
1                            2
2                            5
2                            6

GroupID     Name
1                  Group A
2                  Group B
5                  Group G
6                  Group H

I want to gather a comma separated string similar to a SQL Stuff where I return the tblCustomer details with a Comma such as
Customer ID    Customer Name    Groups
1                        ABC                          Group A, Group B
2                        DEF                           Group G, Group H

What syntax would I use to handle that comma seperated string?
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Alex [***Alex140181***]Software DeveloperCommented:
select a.customerID,
       listagg(c.Name, ',') within group(order by c.Name) Groups
  from tblGroups c,
       tblCustomerGroups b,
       tblCustomer a
 where b.customerID = a.customerID
   and c.GroupID = b.GroupID
 group by a.customerID,

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sbornstein2Author Commented:
thank you
Alex [***Alex140181***]Software DeveloperCommented:
You're welcome ;-)
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