質問編集履歴
3
編集
test
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test
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@@ -46,9 +46,7 @@
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create table classtimes (
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classtime_id int primary key auto_increment,
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classtime_
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classtime_id int,
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id int,
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@@ -62,41 +60,29 @@
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (1,1,1);
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (1,2,1);
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (1,3,1);
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (2,1,2);
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (2,2,2);
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (2,3,2);
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (2,1,3);
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (2,2,3);
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insert into classtimes (classtime_name,weekday_id) values (4,2);
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insert into classtimes (classtime_name,weekday_id) values (5,2);
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insert into classtimes (classtime_name,weekday_id) values (1,3);
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insert into classtimes (classtime_
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insert into classtimes (id,classtime_id,weekday_id) values (2,3,3);
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insert into classtimes (classtime_name,weekday_id) values (3,3);
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insert into classtimes (classtime_name,weekday_id) values (4,3);
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insert into classtimes (classtime_name,weekday_id) values (5,3);
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```
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下記のsql文を書きましたが、
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下記のsql文を書きましたが、
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@@ -114,13 +100,35 @@
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下記のようにエラーが発生してしまいます。
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```lang-sql
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+------+
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| name |
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+------+
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| Math |
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| Math |
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| Math |
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+------+
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```
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うまく出力されない理由として、
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・classtimeテーブルのinsert文がおかしい
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-
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・classtimeテーブルとweekdaysテーブルの間に中間テーブルを設定しなければならない？
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2
修正
test
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test
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@@ -19,6 +19,28 @@
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insert into classes (id,name) values (1,'IT');
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insert into classes (id,name) values (2,'Math');
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create table weekdays (
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weekday_id int primary key auto_increment,
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weekday_name text,
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id int,
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foreign key (id) references classes (id)
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);
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insert into weekdays (weekday_id,weekday_name) values (1,'Sunday');
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insert into weekdays (weekday_id,weekday_name) values (2,'Monday');
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insert into weekdays (weekday_id,weekday_name) values (3,'Tuesday');
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@@ -70,33 +92,11 @@
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insert into classtimes (classtime_name,weekday_id) values (5,3);
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create table weekdays (
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weekday_id int primary key auto_increment,
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weekday_name text,
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id int,
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foreign key (id) references classes (id)
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);
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insert into weekdays (weekday_id,weekday_name) values (1,'Sunday');
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insert into weekdays (weekday_id,weekday_name) values (2,'Monday');
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insert into weekdays (weekday_id,weekday_name) values (3,'Tuesday');
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```
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下記のsql文を書きましたが、
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下記のsql文を書きましたが、Empty set と表示されてしまいます。
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@@ -129,3 +129,15 @@
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よろしくお願いお願いいたします。
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=======
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修正：
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weekdaysテーブルとclasstimesテーブルの順番がおかしかったので訂正しました。
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エラー内容はEmpty setです。
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1
追加
test
CHANGED
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File without changes
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test
CHANGED
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File without changes
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