MySQL combine row results into a new column - sql

Question

I am trying to set up a query to return data to a VB.Net datagrid. I want to rollup the results into a new column kinda like below:
For example on Match-no:
Date Sponsor Match_no Team
---------------------------------------
1-1-11 Nike 1 Tigers
1-1-11 Nike 1 Bears
2-1-11 Crisco 2 Llamas
2-1-11 Crisco 2 Tigers
Roll it up into a new column.
Date Sponsor Match_no Teams_playing
---------------------------------------------------
1-1-11 Nike 1 Tigers vs Bears
2-1-11 Crisco 2 Llamas vs Tigers
I tried using "group_concat" but for some reason it rolled up the entire list on teams into a column regardless of match_no.
In this example there would be 4 tables :
Dates Sponsors Match Team
------ -------- ------- --------
Date_id Sponsor_id Match_id Team_id
Date Sponsor_name Match_no Team_name
Sponsor_id Match_id

Answer 1

Try:
SELECT m.date,
m.sponsor,
m.match_no,
GROUP_CONCAT(m.team, SEPARATOR ' vs ')
FROM MATCH_NO m
GROUP BY m.date, m.sponsor, m.match_no

Answer 2

Your table structure looks suspicious. Dates has no correspondence to Match. Team should be in a separate table with a bridge:
match_team
-----------
match_id
team_id
Or if there are only ever going to be two teams per match, then just
match
---------
match_id
Match_no
sponsor_id
date_id
team_id_a
team_id_b
Normally, one would not create a date table with just id and date, e.g. it doesn't help indexing or searching on the Match table by date.
For your original question, the query would be
select d.date, s.sponsor_name, m.match_no,
group_concat(teams_playing separator ' vs ') Teams_playing
from match m
inner join dates d on d.date_id = m.date_id
inner join sponsors s on s.sponsor_id = m.sponsor_id
inner join team t on t.match_id = m.match_id
group by m.match_id, d.date, s.sponsor_name, m.match_no
Ref: GROUP_CONCAT