php mysqlのクエリでエラー

質問

「←追加」と追加したのですが、Warning: Invalid argument supplied for foreach()とエラーがでました。
調べたり、試行錯誤してみましたがダメでした。
何が間違っているのでしょうか？

try{
$dbh = new PDO($dsn, $user, $password);

print('接続に成功しました。<br>');

$dbh->query('SET NAMES utf8');

$sql = ('SELECT
song.number,
song.song_title,
artist.artist,
ka2.artist as artist_2,
ka3.artist as artist_3,
ka4.artist as artist_4,
ka5.artist as artist_5,
ka6.artist as artist_6,
ka7.artist as artist_7,
ka8.artist as artist_8,
ka9.artist as artist_9,
ka10.artist as artist_10,
ka11.artist as artist_11,
ka12.artist as artist_12,
sakushi.sakushi,
ss2.sakushi as sakushi_2,
ss3.sakushi as sakushi_3,
ss4.sakushi as sakushi_4,
sakkyoku.sakkyoku,
sk2.sakkyoku as sakkyoku_2,
sk3.sakkyoku as sakkyoku_3,
sk4.sakkyoku as sakkyoku_4,
hennkyoku.hennkyoku,
hk2.hennkyoku as hennkyoku_2,
hk3.hennkyoku as hennkyoku_3,
hk4.hennkyoku as hennkyoku_4,
genre,
gr2.genre as genre_2,←追加
tie_up,
part

FROM ((((((((((((((((((((((((((((

song

LEFT JOIN artist ON song.artist_1 = artist.artist_ID)
LEFT JOIN artist ka2 ON song.artist_2 = ka2.artist_ID)
LEFT JOIN artist ka3 ON song.artist_3 = ka3.artist_ID)
LEFT JOIN artist ka4 ON song.artist_4 = ka4.artist_ID)
LEFT JOIN artist ka5 ON song.artist_5 = ka5.artist_ID)
LEFT JOIN artist ka6 ON song.artist_6 = ka6.artist_ID)
LEFT JOIN artist ka7 ON song.artist_7 = ka7.artist_ID)
LEFT JOIN artist ka8 ON song.artist_8 = ka8.artist_ID)
LEFT JOIN artist ka9 ON song.artist_9 = ka9.artist_ID)
LEFT JOIN artist ka10 ON song.artist_10 = ka10.artist_ID)
LEFT JOIN artist ka11 ON song.artist_11 = ka11.artist_ID)
LEFT JOIN artist ka12 ON song.artist_12 = ka12.artist_ID)

LEFT JOIN sakushi ON song.sakushi_1 = sakushi.sakushi_ID)
LEFT JOIN sakushi ss2 ON song.sakushi_2 = ss2.sakushi_ID)
LEFT JOIN sakushi ss3 ON song.sakushi_3 = ss3.sakushi_ID)
LEFT JOIN sakushi ss4 ON song.sakushi_4 = ss4.sakushi_ID)

LEFT JOIN sakkyoku ON song.sakkyoku_1 = sakkyoku.sakkyoku_ID)
LEFT JOIN sakkyoku sk2 ON song.sakkyoku_2 = sk2.sakkyoku_ID)
LEFT JOIN sakkyoku sk3 ON song.sakkyoku_3 = sk3.sakkyoku_ID)
LEFT JOIN sakkyoku sk4 ON song.sakkyoku_4 = sk4.sakkyoku_ID)

LEFT JOIN hennkyoku ON song.hennkyoku_1 = hennkyoku.hennkyoku_ID)
LEFT JOIN hennkyoku hk2 ON song.hennkyoku_2 = hk2.hennkyoku_ID)
LEFT JOIN hennkyoku hk3 ON song.hennkyoku_3 = hk3.hennkyoku_ID)
LEFT JOIN hennkyoku hk4 ON song.hennkyoku_4 = hk4.hennkyoku_ID)

LEFT JOIN genre ON song.genre_1 = genre.genre_ID)
LEFT JOIN genre gr2 ON song.genre_2 = gr2.genre_ID)←追加

LEFT JOIN tie_up ON song.tie_up_1 = tie_up.tie_up_ID)

LEFT JOIN part ON song.part_1 = part.part_ID)

;');

回答No.2

yambejp

join するのにかっこでくくる必要はないのでは？
また正規化するにあたってはleft joinを多用するのはどうかと。
各IDが存在する前提でinner joinでつなぐことをお勧めします

それと、PDOを利用するのに「SET NAMES utf8」を発行するのはやめるべき
PHPのバージョンにもよりますがdsnで指定するかoptionを設定してください

http://php.net/manual/ja/ref.pdo-mysql.connection.php

回答No.1

maiko0318

FROM ((((((((((((((((((((((((((((

ここのカッコは増やしましたか？