MySQL SQL練習問題20261027

MYSQL_Question1.txt

@@ -0,0 +1,32 @@
+--問1
+CREATE TABLE book_table (
+    book_id INT,
+    book_name VARCHAR(50),
+    author_name VARCHAR(50),
+    price INT,
+    sales_flag INT
+);
+
+--問2
+INSERT INTO book_table VALUES(10001, 'TwoPeace', '三田英一郎', 420, 1);
+INSERT INTO book_table VALUES(10002, '名探偵金田二', '青山ふみや', 460, 1);
+INSERT INTO book_table VALUES(20001, '坊ちゃま', '冬目漱岩', 460, 1);
+INSERT INTO book_table VALUES(30001, '西方見聞録', '不明', 1000, 1);
+INSERT INTO book_table VALUES(40010, '吾輩は犬である', '冬目漱岩',     420
+, 1);
+
+--問3
+SELECT book_name, author_name FROM book_table;
+
+--問4
+UPDATE book_table SET author_name = 'マール＝コー＝ポロ', sales_flag = 0 WHERE book_id = 30001;
+
+--問5
+select book_id, book_name, author_name, price, sales_flag from book_table where sales_flag = 1;
+
+--問6
+select book_id, book_name, author_name, price, sales_flag from book_table where author_name = '冬目漱岩' and price = 420;
+
+--問7
+delete from book_table where book_id = 20001;
+select * from book_table;

MYSQL_Question2.txt

@@ -0,0 +1,29 @@
+--問1
+create table item_category (
+    category_id INT AUTO_INCREMENT,
+    category_name VARCHAR(256) not null,
+    primary key(category_id)
+);
+insert into item_category values(1, '家具');
+insert into item_category values(2, '飲料');
+insert into item_category values(3, '食品');
+
+--問2
+create table items(
+    item_id INT AUTO_INCREMENT,
+    name VARCHAR(256) not null,
+    price INT not null,
+    category_id INT,
+    primary key(item_id),
+    foreign key(category_id) references item_category(category_id)
+);
+insert into items values(1,'ローマのテーブル', 150000, 1);
+insert into items values(2,'げーたるーど2000 500ml', 370, 2);
+insert into items values(3,'原始肉', 2500, 3);
+insert into items values(4,'魅惑の椅子', 100000, 1);
+
+--問3
+select * from items inner join item_category using(category_id);
+
+--問4
+select * from items inner join item_category using(category_id) order by price;

MYSQL_Question2_5-.txt

@@ -0,0 +1,14 @@
+--問5
+select * from items inner join item_category using(category_id) where category_name = '家具';
+
+--問6
+select * from items inner join item_category using(category_id) where price between 1000 and 50000;
+
+--問7
+select count(*) as data_count from items;
+
+--問8
+select * from items inner join item_category using(category_id) where  price = (select max(price) from items);
+
+--問9
+select * from items inner join item_category using(category_id) where name like '%の%';

Question2+α.txt

@@ -0,0 +1,10 @@
+--問1
+select items.item_id as 商品ID, items.name as 商品名, items.price as 価格, 
+    item_category.name as カテゴリ名 from items inner join item_category using(category_id);
+    
+--問2
+select orders.order_id as 注文ID, orders.order_time as 注文日時, users.name as ユーザー名, 
+    items.name as 商品名, items.price as 価格, order_items.quantity as 数量 from order_items
+    inner join orders using(order_id)
+    inner join items using(item_id)
+    inner join users using(user_id) order by orders.order_time;