NHL standings in SQL - mysql

Question

I have an SQL query that produces team standings based off the old NHL format. The first section of the code gets the top 3 teams in each division, and the 2nd bit gets the rest and sorts them by points/differential.
This can be seen here: http://rgmgstandings.tk
Here is my SQL query:
("(SELECT *, 1 as `SortKey` from `standings_east`
WHERE pts = (select max(pts)
from standings_east as t
where t.`div` = standings_east.`div`))
UNION ALL
(select *, 2 as SortKey from `standings_east`
where team not in
(select team from standings_east
where pts = (select max(pts)
from standings_east as t
where t.`div` = standings_east.`div`)))
order by SortKey, pts desc, diff desc")
If you visit my website, and look at the standings for the Western Conference (blue banner), you will notice 3 teams in 'CEN' that have the same amount of points (Chicago, Winnipeg, Columbus)
I want the query to select only ONE team from that division based on whoever has the most 'Wins/W'.
The correct standings should be:
Edmonton (NW) 80
Anaheim (PAC) 74
Columbus (CEN) 71
Dallas (PAC) 73
Chicago (CEN) 71
Winnipeg (CEN) 71
How can I accomplish this?

Answer 1

Query
select team,`div`,pts,1 as sortOrder
from
( -- note use parentheses to avoid mysql error 1221
(select team,`div`,pts,#cen:=team from `standings_west` where `div`='CEN' order by pts desc limit 1)
union all
(select team,`div`,pts,#pac:=team from `standings_west` where `div`='PAC' order by pts desc limit 1)
union all
(select team,`div`,pts,#nw:=team from `standings_west` where `div`='NW' order by pts desc limit 1)
) xDerived1
cross join (select #cen='',#pac='',#nw='') params
union
select team,`div`,pts,sortOrder
from
( select team,`div`,pts,2 as sortOrder
from `standings_west`
where team!=#cen and team!=#pac and team!=#nw
order by pts desc
limit 3
) xDerived2
order by sortOrder,pts desc;
Results
+----------+-----+-----+-----------+
| team | div | pts | sortOrder |
+----------+-----+-----+-----------+
| EDMONTON | NW | 80 | 1 |
| ANAHEIM | PAC | 74 | 1 |
| WINNIPEG | CEN | 71 | 1 |
| DALLAS | PAC | 73 | 2 |
| CHICAGO | CEN | 71 | 2 |
| COLUMBUS | CEN | 71 | 2 |
+----------+-----+-----+-----------+
Stored Proc
The following depicts a stored proc just to show it in case you are having problems and need it.
drop procedure if exists xdoit;
delimiter $$
create procedure xdoit()
begin
select team,`div`,pts,1 as sortOrder
from
( -- note use parentheses to avoid mysql error 1221
(select team,`div`,pts,#cen:=team from `standings_west` where `div`='CEN' order by pts desc limit 1)
union all
(select team,`div`,pts,#pac:=team from `standings_west` where `div`='PAC' order by pts desc limit 1)
union all
(select team,`div`,pts,#nw:=team from `standings_west` where `div`='NW' order by pts desc limit 1)
) xDerived1
cross join (select #cen='',#pac='',#nw='') params
union
select team,`div`,pts,sortOrder
from
( select team,`div`,pts,2 as sortOrder
from `standings_west`
where team!=#cen and team!=#pac and team!=#nw
order by pts desc
limit 3
) xDerived2
order by sortOrder,pts desc;
end$$
delimiter ;
call stored proc
call xdoit();
A few comments here.
First, your sqlfiddle had data from the west, but a query from the east. Based on table names, I suggest you have all your data in one table not two and have a column for east or west.
The query uses a cross join to merely establish variables for grabbing the division leaders so those division leaders are excluded for the sortOrder=2 teams.
Tweak as necessary for tie-breaks (ie: the teams with 71 points) regarding your implemention of DIFF in comments to #Clockwork
Ask if you have any questions.
The following is the multi_query php solution I came up with for you based on your posting of a comment in that chat room.
The only solution I could come up with was the following based on clearly the results were coming back in two result sets. Thus the while loop that is driven by next_result(). The first result set has the top 3 rows, the 2nd result set has the twelve rows that follow. That is just the way PHP seems to see it.
Also note that in the PHP part, since I seemed to be dealing with a multi_query, I took advantage of that and passed the mysql parameters in versus doing a cross join to pick them up.
PHP
<!DOCTYPE html>
<html lang="en">
<head>
<title>RGMG: Standings</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
</head>
<body>
<?php
//mysqli_report(MYSQLI_REPORT_ALL);
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
error_reporting(E_ALL); // report all PHP errors
ini_set("display_errors", 1);
try {
$mysqli= new mysqli('localhost', 'dbUser', 'thePassword', 'theDbName');
echo "<table><div><br><br>"; // note you had this line a little bit wrong
// notice below the concat of the $sql and the multi_query()
$sql = "set #cen:='',#pac:='',#nw:=''; ";
$sql .= "select *
from
( select team,`div`,gp,win,lose,otl,goalsF,goalsA,diff,gpg,gaa,pts,1 as sortOrder
from
( -- note use parentheses to avoid mysql error 1221
(select team,`div`,gp,win,lose,otl,goalsF,goalsA,diff,gpg,gaa,pts,#cen:=team from `standings_west` where `div`='CEN' order by pts desc, win desc, diff desc limit 1)
union all
(select team,`div`,gp,win,lose,otl,goalsF,goalsA,diff,gpg,gaa,pts,#pac:=team from `standings_west` where `div`='PAC' order by pts desc, win desc, diff desc limit 1)
union all
(select team,`div`,gp,win,lose,otl,goalsF,goalsA,diff,gpg,gaa,pts,#nw:=team from `standings_west` where `div`='NW' order by pts desc, win desc, diff desc limit 1)
) xDerived1
union all
select team,`div`,gp,win,lose,otl,goalsF,goalsA,diff,gpg,gaa,pts,sortOrder
from
( select team,`div`,gp,win,lose,otl,goalsF,goalsA,diff,gpg,gaa,pts,2 as sortOrder
from `standings_west`
where team!=#cen and team!=#pac and team!=#nw
order by pts desc
) xDerived2
) xDerived3
order by sortOrder,pts desc";
echo "<div class='container'>";
echo "<img src='http://i.imgur.com/sjDHhIV.png' width='100%' alt='West'>";
echo "<table class='table table-condensed'>
<tr class='top'>
<th class='rank'></th>
<th class='team'>TEAM</th>
<th>DIV</th>
<th>GP</th>
<th>W</th>
<th>L</th>
<th class='otl'>OTL</th>
<th class='pts'>PTS</th>
<th>GF</th>
<th>GA</th>
<th>DIFF</th>
<th>GPG</th>
<th>GAA</th>
";
$counter=1;
$mysqli->multi_query($sql);
while(true) {
if ($result = $mysqli->store_result()) {
while ($row = $result->fetch_assoc()) {
$gpg = ($row['goalsF']);
$gaa = ($row['goalsA']);
if ($row['gp'] != 0 ){
$gpg = ($row['goalsF'] / $row['gp']);
$gaa = ($row['goalsA'] / $row['gp']);
}
else {
$row['gp'] = "";
}
echo "<tr>
<td class='rank'>" . "$counter" . "</td>
<td class='team'>" . $row['team'] . "</td>
<td>" . $row['div'] . "</td>
<td>" . $row['gp'] . "</td>
<td>" . $row['win'] . "</td>
<td>" . $row['lose'] . "</td>
<td class='otl'>" . $row['otl'] . "</td>
<td class='pts'>" . $row['pts'] . "</td>
<td>" . $row['goalsF'] . "</td>
<td>" . $row['goalsA'] . "</td>
<td>" . $row['diff'] . "</td>
<td>" . round($gpg, 2) . "</td>
<td>" . round($gaa, 2) . "</td>";
$counter++;
}
$result->free();
}
if ($mysqli->more_results()) {
$mysqli->next_result();
}
else {
break;
}
}
echo "</table></div>";
$mysqli->close();
} catch (mysqli_sql_exception $e) {
throw $e;
}
?>
</body>
</html>

Answer 2

First i love NHL and from your query we can say the table you are showing us is standings_east,so let's try this:
select team,DIV,GP,W,L,OTL,PTS,GF,GA,DIFF,GPG,GAA,1 as sort_key
from standings_east t
where exists
(select 1
from
(select DIV,max(PTS) as PTS,max(W) as W from standings_east
group by DIV) a
where t.DIV=a.DIV and t.PTS=a.PTS and t.W=a.W
)
UNION ALL
select team,DIV,GP,W,L,OTL,PTS,GF,GA,DIFF,GPG,GAA,2 as sort_key
from standings_east t
where not exists
(select 1
from
(select DIV,max(PTS) as PTS,max(W) as W from standings_east
group by DIV) a
where t.DIV=a.DIV and t.PTS=a.PTS and t.W=a.W
)
order by sort_key,PTS DESC
i think there is some better way but this is the one like yours the most and the easiest to understand just add a group by on your code and Merry Christmas