As my info states, I inherited the job of statistician for a local dart league. (Woohoo $20 a season)
I would love to implement an ELO rating system.
The current database table has over 100,000 entries.
There are 3 different games that are played. Singles, Doubles, and Team.
The originator of the database has the games entered as such:
Index Player1_num Player2_num Opp_Player1_num Odd_Player2_num H_team V_team Season Week W L Game_type
A singles game is entered twice.
values(1,20,null,30,null,200,300,11,2,1,0,301_singles)
and
values(2,30,null,20,null,200,300,11,2,0,1,301_singles)
It was done this way to facilitate easier look-ups of individuals.
A doubles game would have values such as
(3,20,21,30,31,200,300,11,2,1,0,501_doubles)
(4,21,20,30,31,200,300,11,2,1,0,501_doubles)
(5,30,31,20,21,200,300,11,2,0,1,501_doubles)
(6,31,30,20,21,200,300,11,2,0,1,501_doubles)
There again, it is built for easier queries for looking up wins and losses across seasons and with different partners.
A team game is:
(7,null,null,null,null,200,300,11,2,1,0,team_game)
So I added a match_num column to the table to help lump the games under 1 number.
However, I am unsure how best to assign the numbers, understandably, I don't feel like going through all 90k entries by hand.
Note: The early seasons were modified by hand and not all double matches have 4 entries (some only have 1). Some matches may be out of order as well (Instead of indexes: 1,2 they could be 1,9).
I don't know if you need more info for this, and I am unsure of how to post larger examples of the table.
Current code:
<body>
<?php
include "inc.php";
// Select Max Match Number
$sqlMatch="select max(match_num) from stats_results";
$match =mysql_query($sqlMatch);
$m= $match ? mysql_result($match,0):mysql_error();
$matchno= $m+1; // First Match number
$game=array("'301_singles'","'cricket_singles'","'501_singles'","'301_doubles'","'cricket_doubles'");
// selects max season
$sqlSeason="select max(season_index) from stats_season";
$season =mysql_query($sqlSeason);
$smax= $season ? mysql_result($season,0):mysql_error();
# $smax=2;
// for each season up to max season
for($s=1;$s<=$smax;$s++)
{
// Selects max week within the current season
$sqlWeek="select max(week) from stats_results where season=$s ";
$Week =mysql_query($sqlWeek);
$wmax= $Week ? mysql_result($Week,0):mysql_error();
# $wmax=2;
// for each week within current season up to the max week
for ($w=1;$w<=$wmax;$w++)
{
// each singles game
foreach($game as $g)
{
###########################################################################################################
$result = mysql_query("SELECT * FROM stats_results where season=$s and week=$w and game_code=$g ;") or die(mysql_error());
// Put them in array
for($i = 0; $rows[$i] = mysql_fetch_assoc($result); $i++) ;
// Delete last empty one
array_pop($rows);
//******************************************************
$matches=array();
foreach($rows as $record)
{
// Get a unique match code for this match
$matchid= getMatchID($record);
// Have we seen this ID before? If yes add this record index to the existing array
// otherwise create an array with just this value
if (!isset($matches[$matchid])) $matches[$matchid]= array($record['index_results']); // No
else $matches[$matchid][]= $record['index_results']; // Yes, add this Index
}
// Now $matches is an array of arrays of Index values, grouped by "match" so...
/* Sort $matches by key (see getMatchID for why!) */
ksort($matches);
// Update the table
foreach($matches as $match)
{
// Create SQL instruction to set the match_num for all the Index values in each entry
$sql= "UPDATE stats_results SET match_num = $matchno WHERE index_results IN (".implode(",", $match).")";
echo "<br>";
echo $sql;
/* Execute the SQL using your chosen method! */
// Move the match count on
$matchno++;
}
// End our loops
}
}
}
function getMatchID($gamerecord)
{
$index= "{$gamerecord['season']}-{$gamerecord['week']}-{$gamerecord['game_code']}-";
$players= array(
$gamerecord['player1_num'],
empty($gamerecord['player2_num'])?0:$gamerecord['player2_num'],
$gamerecord['opp_player1_num'],
empty($gamerecord['opp_player2_num'])?0:$gamerecord['opp_player2_num']
);
// Sort the players to get them in a consistent order
sort($players);
// Add the sorted players to the index
$index.= implode('-', $players);
return $index;
}
?>
</body>
