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%';

Question1/MySQL SQL問題集 part1.sql

@@ -1,36 +0,0 @@
---<EFBFBD><EFBFBD><EFBFBD>P
-CREATE TABLE book_table (
-    book_id INT,
-    book_name VARCHAR(50),
-    author_name VARCHAR(50),
-    price INT,
-    sales_flag INT
-);
-
---<EFBFBD><EFBFBD><EFBFBD>Q
-INSERT INTO book_table VALUES(10001,'TwoPeace','<EFBFBD>O<EFBFBD>c<EFBFBD>p<EFBFBD><EFBFBD><EFBFBD>Y',420,1);
-INSERT INTO book_table VALUES(10002,'<EFBFBD><EFBFBD><EFBFBD>T<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>c<EFBFBD><EFBFBD>','<EFBFBD>ŽR<EFBFBD>ӂ݂<EFBFBD>',460,1);
-INSERT INTO book_table VALUES(20001,'<EFBFBD>V<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>','<EFBFBD>~<7E>ڟ<EFBFBD><DA9F><EFBFBD>',460,1);
-INSERT INTO book_table VALUES(30001,'<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>^','<EFBFBD>s<EFBFBD><EFBFBD>',1000,1);
-INSERT INTO book_table VALUES(40010,'<EFBFBD><EFBFBD><EFBFBD>y<EFBFBD>͌<EFBFBD><EFBFBD>ł<EFBFBD><EFBFBD><EFBFBD>','<EFBFBD>~<7E>ڟ<EFBFBD><DA9F><EFBFBD>',420,1);
-
---<EFBFBD><EFBFBD><EFBFBD>R
-SELECT book_name,author_name FROM book_table;
-
---<EFBFBD><EFBFBD><EFBFBD>S
-UPDATE book_table 
-SET author_name = '<EFBFBD>}<7D>[<5B><><EFBFBD><EFBFBD><EFBFBD>R<EFBFBD>[<5B><><EFBFBD>|<7C><>',
-    sales_flag = 0
-WHERE book_id = 30001;
-
---<EFBFBD><EFBFBD><EFBFBD>T
-SELECT * FROM book_table
-WHERE sales_flag = 1;
-
---<EFBFBD><EFBFBD><EFBFBD>U
-SELECT * FROM book_table
-WHERE author_name = '<EFBFBD>~<7E>ڟ<EFBFBD><DA9F><EFBFBD>' AND price = 420;
-
---<EFBFBD><EFBFBD><EFBFBD>V
-DELETE FROM book_table
-WHERE book_id = 20001;

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;

Question2/MySQL SQL問題集 part２.sql

@@ -1,79 +0,0 @@
---<EFBFBD><EFBFBD><EFBFBD>P
-CREATE TABLE item_category (
-    category_id INT AUTO_INCREMENT PRIMARY KEY,
-    category_name VARCHAR(256) NOT NULL
-);
-
-INSERT INTO item_category(category_name) VALUES('<EFBFBD>Ƌ<EFBFBD>'),('<EFBFBD><EFBFBD><EFBFBD><EFBFBD>'),('<EFBFBD>H<EFBFBD>i');
-
-
---<EFBFBD><EFBFBD><EFBFBD>Q
-CREATE TABLE items(
-    item_id INT AUTO_INCREMENT PRIMARY KEY,
-    name VARCHAR(256) NOT NULL,
-    price INT NOT NULL,
-    category_id INT,
-    FOREIGN KEY(category_id) REFERENCES item_category(category_id)
-);
-
-INSERT INTO items(name,price,category_id) 
-VALUES('<EFBFBD><EFBFBD><EFBFBD>[<5B>}<7D>̃e<CC83>[<5B>u<EFBFBD><75>',150000,1),('<EFBFBD><EFBFBD><EFBFBD>[<5B><><EFBFBD><EFBFBD><EFBFBD>[<5B><>2000 500ml',370,2),('<EFBFBD><EFBFBD><EFBFBD>n<EFBFBD><EFBFBD>',2500,3),('<EFBFBD><EFBFBD><EFBFBD>f<EFBFBD>̈֎q',100000,1);
-
---<EFBFBD><EFBFBD><EFBFBD>R
-SELECT 
-a.item_id,
-a.name,
-a.price,
-b.category_id,
-b.category_name 
-FROM items a
-INNER JOIN item_category b
-ON a.category_id = b.category_id;
-
-
---<EFBFBD><EFBFBD><EFBFBD>S
-SELECT *
-FROM items
-ORDER BY price;
-
---<EFBFBD><EFBFBD><EFBFBD>T
-SELECT 
-a.item_id,
-a.name,
-a.price,
-b.category_id,
-b.category_name 
-FROM items a
-INNER JOIN item_category b
-ON a.category_id = b.category_id AND b.category_name = '<EFBFBD>Ƌ<EFBFBD>';
-
---<EFBFBD><EFBFBD><EFBFBD>U
-SELECT 
-a.item_id,
-a.name,
-a.price,
-b.category_id,
-b.category_name 
-FROM items a
-INNER JOIN item_category b
-ON a.category_id = b.category_id AND a.price <= 50000 AND a.price >= 1000;
-
---<EFBFBD><EFBFBD><EFBFBD>V
-SELECT COUNT(*) AS data_count
-FROM items;
-
---<EFBFBD><EFBFBD><EFBFBD>W
-SELECT * FROM items
-WHERE price = (SELECT MAX(price) FROM items);
-
---<EFBFBD><EFBFBD><EFBFBD>X
-SELECT 
-a.item_id,
-a.name,
-a.price,
-b.category_id,
-b.category_name 
-FROM items a
-INNER JOIN item_category b
-ON a.category_id = b.category_id
-WHERE a.name LIKE'%<25><>%';