mysql_query("UPDATE nfl_new SET Season = if(MONTH(date)<5, YEAR(date)-1,YEAR(date))");
$sql= "SELECT * FROM nfl_new";
if (!$results = mysql_query($sql,$con))
{
die('Error: ' . mysql_error());
}
$num = mysql_numrows($results);
$i = 0;
while ($i < $num) {
//get a row from mysql one at a time
$row = mysql_fetch_row($results, $i);
//calculate aw teams's offense
$awscoreaw = mysql_query("SELECT SUM(aw_score) AS awscoreaw FROM nfl_new WHERE away='$row[away]' AND date<'$row[date]' AND Season='$row[Season]'");
$awgames = mysql_query("SELECT SUM(if((away = '$row[away]' OR home = '$row[away]') AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgames FROM nfl_new");
$awgamesaw = mysql_query("SELECT SUM(if(away = '$row[away]' AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgamesaw FROM nfl_new");
$awgameshm = mysql_query("SELECT SUM(if(home = '$row[away]' AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgameshm FROM nfl_new");
$awscorehm = mysql_query("SELECT SUM(hm_score) AS awscorehm FROM nfl_new WHERE home='$row[away]' AND date<'$row[date]' AND Season='$row[Season]'");
$awscoreaw = mysql_fetch_assoc($awscoreaw);
$awscorehm = mysql_fetch_assoc($awscorehm);
$awgames = mysql_fetch_assoc($awgames);
$awgamesaw = mysql_fetch_assoc($awgamesaw);
$awgameshm = mysql_fetch_assoc($awgameshm);
$aw_off = ($awscoreaw['awscoreaw'] + $awscorehm['awscorehm']+$awgamesaw['awgamesaw']*1.5-$awgameshm['awgameshm']*1.5)/$awgames['awgames'];
//calculate aw teams's defense
$awscoreaw = mysql_query("SELECT SUM(hm_score) AS awscoreaw FROM nfl_new WHERE away='$row[away]' AND date<'$row[date]' AND Season='$row[Season]'");
$awgames = mysql_query("SELECT SUM(if((away = '$row[away]' OR home = '$row[away]') AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgames FROM nfl_new");
$awgamesaw = mysql_query("SELECT SUM(if(away = '$row[away]' AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgamesaw FROM nfl_new");
$awgameshm = mysql_query("SELECT SUM(if(home = '$row[away]' AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgameshm FROM nfl_new");
$awscorehm = mysql_query("SELECT SUM(aw_score) AS awscorehm FROM nfl_new WHERE home='$row[away]' AND date<'$row[date]' AND Season='$row[Season]'");
$awscoreaw = mysql_fetch_assoc($awscoreaw);
$awscorehm = mysql_fetch_assoc($awscorehm);
$awgames = mysql_fetch_assoc($awgames);
$awgamesaw = mysql_fetch_assoc($awgamesaw);
$awgameshm = mysql_fetch_assoc($awgameshm);
$aw_def = ($awscoreaw['awscoreaw'] + $awscorehm['awscorehm']-$awgamesaw['awgamesaw']*1.5+$awgameshm['awgameshm']*1.5)/$awgames['awgames'];
//calculate hm teams's offense
$hmscoreaw = mysql_query("SELECT SUM(aw_score) AS awscoreaw FROM nfl_new WHERE away='$row[home]' AND date<'$row[date]' AND Season='$row[Season]'");
$hmgames = mysql_query("SELECT SUM(if((away = '$row[home]' OR home = '$row[home]') AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgames FROM nfl_new");
$hmgamesaw = mysql_query("SELECT SUM(if(away = '$row[home]' AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgamesaw FROM nfl_new");
$hmgameshm = mysql_query("SELECT SUM(if(home = '$row[home]' AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgameshm FROM nfl_new");
$hmscorehm = mysql_query("SELECT SUM(hm_score) AS awscorehm FROM nfl_new WHERE home='$row[home]' AND date<'$row[date]' AND Season='$row[Season]'");
$hmscoreaw = mysql_fetch_assoc($hmscoreaw);
$hmscorehm = mysql_fetch_assoc($hmscorehm);
$hmgames = mysql_fetch_assoc($hmgames);
$hmgamesaw = mysql_fetch_assoc($hmgamesaw);
$hmgameshm = mysql_fetch_assoc($hmgameshm);
$hm_off = ($hmscoreaw['awscoreaw'] + $hmscorehm['awscorehm']+$hmgamesaw['awgamesaw']*1.5-$hmgameshm['awgameshm']*1.5)/$hmgames['awgames'];
//calculate hm teams's defense
$hmscoreaw = mysql_query("SELECT SUM(hm_score) AS awscoreaw FROM nfl_new WHERE away='$row[home]' AND date<'$row[date]' AND Season='$row[Season]'");
$hmgames = mysql_query("SELECT SUM(if((away = '$row[home]' OR home = '$row[home]') AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgames FROM nfl_new");
$hmgamesaw = mysql_query("SELECT SUM(if(away = '$row[home]' AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgamesaw FROM nfl_new");
$hmgameshm = mysql_query("SELECT SUM(if(home = '$row[home]' AND date<'$row[date]' AND Season='$row[Season]', 1, 0)) AS awgameshm FROM nfl_new");
$hmscorehm = mysql_query("SELECT SUM(aw_score) AS awscorehm FROM nfl_new WHERE home='$row[home]' AND date<'$row[date]' AND Season='$row[Season]'");
$hmscoreaw = mysql_fetch_assoc($hmscoreaw);
$hmscorehm = mysql_fetch_assoc($hmscorehm);
$hmgames = mysql_fetch_assoc($hmgames);
$hmgamesaw = mysql_fetch_assoc($hmgamesaw);
$hmgameshm = mysql_fetch_assoc($hmgameshm);
$hm_def = ($hmscoreaw['awscoreaw'] + $hmscorehm['awscorehm']-$hmgamesaw['awgamesaw']*1.5+$hmgameshm['awgameshm']*1.5)/$hmgames['awgames'];
mysql_query("UPDATE nfl_new SET aw_off='$aw_off', aw_def='$aw_def', hm_off='$hm_off', hm_def='$hm_def' WHERE away='$row[away]' AND date='$row[date]' AND Season='$row[Season]'");
echo $row['date'].' '.$row['away'].' '.$aw_def.'<br />';
ob_flush();
flush();
$i++;
}
这是SHOW CREATE TABLE
的输出 nfl_new CREATE TABLE `nfl_new` (
`id` int(8) NOT NULL AUTO_INCREMENT,
`date` date NOT NULL,
`away` varchar(40) NOT NULL,
`aw_line` varchar(6) NOT NULL,
`home` varchar(40) NOT NULL,
`hm_line` varchar(6) NOT NULL,
`total` varchar(6) NOT NULL,
`aw_score` int(3) NOT NULL,
`hm_score` int(3) NOT NULL,
`aw_firstdown` int(3) NOT NULL,
`hm_firstdown` int(3) NOT NULL,
`aw_rush_att` int(3) NOT NULL,
`hm_rush_att` int(3) NOT NULL,
`aw_rush_yds` varchar(3) NOT NULL,
`hm_rush_yds` varchar(3) NOT NULL,
`aw_pass_yds` varchar(3) NOT NULL,
`hm_pass_yds` varchar(3) NOT NULL,
`aw_ret_yds` varchar(3) NOT NULL,
`hm_ret_yds` varchar(3) NOT NULL,
`aw_pass_comp` int(3) NOT NULL,
`hm_pass_comp` int(3) NOT NULL,
`aw_pass_att` int(3) NOT NULL,
`hm_pass_att` int(3) NOT NULL,
`aw_int` int(2) NOT NULL,
`hm_int` int(2) NOT NULL,
`aw_sacks` int(2) NOT NULL,
`hm_sacks` int(2) NOT NULL,
`aw_sack_yds` int(3) NOT NULL,
`hm_sack_yds` int(3) NOT NULL,
`aw_fum` int(2) NOT NULL,
`hm_fum` int(2) NOT NULL,
`aw_fum_lost` int(2) NOT NULL,
`hm_fum_lost` int(2) NOT NULL,
`aw_pen` int(3) NOT NULL,
`hm_pen` int(3) NOT NULL,
`aw_pen_yds` int(4) NOT NULL,
`hm_pen_yds` int(4) NOT NULL,
`aw_fg_att` int(2) NOT NULL,
`hm_fg_att` int(2) NOT NULL,
`aw_fg` int(2) NOT NULL,
`hm_fg` int(2) NOT NULL,
`aw_top` varchar(8) NOT NULL,
`hm_top` varchar(8) NOT NULL,
`Season` year(4) NOT NULL,
`aw_off` double NOT NULL,
`aw_def` double NOT NULL,
`hm_off` double NOT NULL,
`hm_def` double NOT NULL,
`aw_mov` double NOT NULL,
`hm_mov` double NOT NULL,
`aw_sos` double NOT NULL,
`hm_sos` double NOT NULL,
`aw_sim` double NOT NULL,
`hm_sim` double NOT NULL,
`aw_ypp_off` double NOT NULL,
`aw_ypp_def` double NOT NULL,
`hm_ypp_off` double NOT NULL,
`hm_ypp_def` double NOT NULL,
`aw_ypp_mov` double NOT NULL,
`hm_ypp_mov` double NOT NULL,
`aw_ypp_sos` double NOT NULL,
`hm_ypp_sos` double NOT NULL,
`aw_ypp_sim` double NOT NULL,
`hm_ypp_sim` double NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=6733 DEFAULT CHARSET=latin1
答案 0 :(得分：0)
我不完全确定你在做什么，但我认为这将所有内容合并为一个查询：
SELECT n2.date, n2.season, n2.away,
SUM(n2.away IN (n1.away, n1.home)) AS awgames,
SUM(n2.home IN (n1.away, n1.home)) AS hmgames,
SUM(n2.away = n1.away) AS awgamesaw,
SUM(n2.away = n1.home) AS awgameshm,
SUM(n2.home = n1.away) AS hmgamesaw,
SUM(n2.home = n1.home) AS hmgameshm,
SUM(IF(n2.away = n1.away, aw_score)) AS awgamesaw_awscore,
SUM(IF(n2.away = n1.away, hm_score)) AS awgamesaw_hmscore,
SUM(IF(n2.away = n1.home, aw_score)) AS awgameshm_awscore,
SUM(IF(n2.away = n1.home, hm_score)) AS awgameshm_hmscore,
SUM(IF(n2.home = n1.away, aw_score)) AS hmgamesaw_awscore,
SUM(IF(n2.home = n1.away, hm_score)) AS hmgamesaw_hmscore,
SUM(IF(n2.home = n1.home, aw_score)) AS hmgameshm_awscore,
SUM(IF(n2.home = n1.home, hm_score)) AS hmgameshm_hmscore,
FROM nfl_new n1 JOIN nfl_new n2
ON n1.date < n2.date AND n1.season = n2.season AND (n2.home IN (n1.home, n1.away) OR n2.away IN (n1.home, n1.away))
GROUP BY n2.date, n2.season, n2.away
它花了这么长时间（在重复的查询旁边）的原因是它似乎是二次计算。您循环遍历第一个查询返回的所有行，并且对于每个行，您将在季节中汇总其前面的所有行。这是很多重复。
最好执行一个返回按季节和日期排序的所有行的查询，并计算PHP代码中的运行总计。也可以使用用户定义的变量直接在SQL中执行此操作。我现在太累了，试图写出那个版本的查询。