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How can I group a column one or more results in the same column?

User_OMEF8Dec 4 2020

I have a query that returns multiple rows. There is one column that I want to concatenate into the same column. I have a query that can return the result below.

ID | FirstName | LastName | City | State | Phone | SystemDate
1 | John | Doe | ABC | FL | 5555555555 | 2020-12-01
1 | John | Doe | ABC | FL | 8888888888 | 2020-12-01
2 | Jane | Smith | XYZ | CA | 9999999999 | 2020-12-01

What I would like to do is have the output look like this instead.

ID | FirstName | LastName | City | State | Phone | SystemDate
1 | John | Doe | ABC | FL | 5555555555, 8888888888 | 2020-12-01
2 | Jane | Smith | XYZ | CA | 9999999999 | 2020-12-01

Here is my query that can do the first output.
select a.idref, p.firstname, p.lastname, d.city, d.state, m.phone, m.createdate
from master m
join demographics d on m.did = d.id
join commoninfo c on d.eid = c.id
join acounts a on c.aid = a.id
join people p on a.pid = p.id
where m.createdate >= trunc(sysdate + interval '-1' day);

Any tips or hints for this newbie is greatly appreciated. Thanks in advance.

This post has been answered by Solomon Yakobson on Dec 4 2020
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