From b8c3341e34b551b17dc70bf3c43bd531c2ab0458 Mon Sep 17 00:00:00 2001 From: m-endo <26-s-i-tm-nets@it-college.jp> Date: Mon, 28 Sep 2026 16:09:47 +0900 Subject: [PATCH] =?UTF-8?q?SQL=20=E5=95=8F=E9=A1=8C=E9=9B=86part2=E5=AE=8C?= =?UTF-8?q?=E4=BA=86?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../Question1/MySQL SQL問題集 part２.txt | 139 ++++++++++++++++++ 1 file changed, 139 insertions(+) create mode 100644 【練習問題】 SQL/Question1/MySQL SQL問題集 part２.txt diff --git a/【練習問題】 SQL/Question1/MySQL SQL問題集 part２.txt b/【練習問題】 SQL/Question1/MySQL SQL問題集 part２.txt new file mode 100644 index 0000000..df7e573 --- /dev/null +++ b/【練習問題】 SQL/Question1/MySQL SQL問題集 part２.txt @@ -0,0 +1,139 @@ +MySQL SQL問題集 part２ + +mysql> CREATE TABLE item_category(category_id INT,category_name VARCHAR(256)); +Query OK, 0 rows affected (0.03 sec) + +mysql> SELECT * FROM item_category; +Empty set (0.00 sec) + +mysql> alter table item_category ADD PRIMARY KEY (category_id); +Query OK, 0 rows affected (0.04 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> alter table item_category MODIFY COLUMN category_name VARCHAR(256) NOT NULL; +Query OK, 0 rows affected (0.06 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> CREATE TABLE items (item_id INT,name VARCHAR(256), price INT,category_id INT); +Query OK, 0 rows affected (0.03 sec) + +mysql> alter table items ADD PRIMARY KEY (item_id); +Query OK, 0 rows affected (0.03 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> ALTER TABLE items MODIFY COLUMN price INT NOT NULL; +Query OK, 0 rows affected (0.03 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> ALTER TABLE items ADD CONSTRAINT fk_category FOREIGN KEY (category_id) REFERENCES item_category(category_id); +Query OK, 0 rows affected (0.04 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> INSERT INTO item_category VALUES (1,'家具'); +Query OK, 1 row affected (0.02 sec) + +mysql> INSERT INTO item_category VALUES(2,'飲料'); +Query OK, 1 row affected (0.01 sec) + +mysql> INSERT INTO item_category VALUES(3,'食料'); +Query OK, 1 row affected (0.01 sec) + +mysql> SELECT * FROM item_category; ++-------------+---------------+ +| category_id | category_name | ++-------------+---------------+ +| 1 | 家具 | +| 2 | 飲料 | +| 3 | 食品 | ++-------------+---------------+ +3 rows in set (0.00 sec) +mysql> INSERT INTO items VALUES (1,'ローマのテーブル',150000,1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items VALUES(2,'げーたるーど2000 500ｍｌ',370,2); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items VALIES(3,'原始肉',2500,3); +ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'VALIES(3,'原始肉',2500,3)' at line 1 +mysql> INSERT INTO items VALUES(3,'原始肉',2500,3); +Query OK, 1 row affected (0.01 sec) + +mysql> INSERT INTO items VALUES(4,'魅惑の椅子',100000,1); +Query OK, 1 row affected (0.01 sec) + +mysql> SEKECT * FROM items; +ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SEKECT * FROM items' at line 1 +mysql> SELECT * FROM items; ++---------+--------------------------+--------+-------------+ +| item_id | name | price | category_id | ++---------+--------------------------+--------+-------------+ +| 1 | ローマのテーブル | 150000 | 1 | +| 2 | げーたるーど2000 500ｍｌ | 370 | 2 | +| 3 | 原始肉 | 2500 | 3 | +| 4 | 魅惑の椅子 | 100000 | 1 | ++---------+--------------------------+--------+-------------+ +4 rows in set (0.01 sec) + +mysql> SELECT items.category_id,items.item_id,items.name,items.price,item_category.category_name FROM item_category INNER JOIN items ON items.category_id = item_category.category_id; ++-------------+---------+--------------------------+--------+---------------+ +| category_id | item_id | name | price | category_name | ++-------------+---------+--------------------------+--------+---------------+ +| 1 | 1 | ローマのテーブル | 150000 | 家具 | +| 1 | 4 | 魅惑の椅子 | 100000 | 家具 | +| 2 | 2 | げーたるーど2000 500ｍｌ | 370 | 飲料 | +| 3 | 3 | 原始肉 | 2500 | 食品 | ++-------------+---------+--------------------------+--------+---------------+ +4 rows in set (0.00 sec) + +mysql> SELECT items.category_id,items.item_id,items.name,items.price,item_category.category_name FROM item_category INNER JOIN items ON items.category_id = item_category.category_id ORDER BY price ASC; ++-------------+---------+--------------------------+--------+---------------+ +| category_id | item_id | name | price | category_name | ++-------------+---------+--------------------------+--------+---------------+ +| 2 | 2 | げーたるーど2000 500ｍｌ | 370 | 飲料 | +| 3 | 3 | 原始肉 | 2500 | 食品 | +| 1 | 4 | 魅惑の椅子 | 100000 | 家具 | +| 1 | 1 | ローマのテーブル | 150000 | 家具 | ++-------------+---------+--------------------------+--------+---------------+ +4 rows in set (0.00 sec) + +mysql> SELECT items.category_id,items.item_id,items.name,items.price,item_category.category_name FROM item_category INNER JOIN items ON items.category_id = item_category.category_id WHERE category_name = '家具'; ++-------------+---------+------------------+--------+---------------+ +| category_id | item_id | name | price | category_name | ++-------------+---------+------------------+--------+---------------+ +| 1 | 1 | ローマのテーブル | 150000 | 家具 | +| 1 | 4 | 魅惑の椅子 | 100000 | 家具 | ++-------------+---------+------------------+--------+---------------+ +2 rows in set (0.00 sec) + +mysql> SELECT items.category_id,items.item_id,items.name,items.price,item_category.category_name FROM item_category INNER JOIN items ON items.category_id = item_category.category_id WHERE price BETWEEN 1000 AND 50000; ++-------------+---------+--------+-------+---------------+ +| category_id | item_id | name | price | category_name | ++-------------+---------+--------+-------+---------------+ +| 3 | 3 | 原始肉 | 2500 | 食品 | ++-------------+---------+--------+-------+---------------+ +1 row in set (0.00 sec) + +mysql> SELECT COUNT(*) AS data_count FROM items; ++------------+ +| data_count | ++------------+ +| 4 | ++------------+ +1 row in set (0.02 sec) + +mysql> SELECT items.category_id,items.item_id,items.name,items.price,item_category.category_name FROM item_category INNER JOIN items ON items.category_id = item_category.category_id WHERE items.price = (SELECT MAX(price)FROM items); ++-------------+---------+------------------+--------+---------------+ +| category_id | item_id | name | price | category_name | ++-------------+---------+------------------+--------+---------------+ +| 1 | 1 | ローマのテーブル | 150000 | 家具 | ++-------------+---------+------------------+--------+---------------+ +1 row in set (0.01 sec) + +mysql> SELECT items.category_id,items.item_id,items.name,items.price,item_category.category_name FROM item_category INNER JOIN items ON items.category_id = item_category.category_id WHERE name LIKE '%の%'; ++-------------+---------+------------------+--------+---------------+ +| category_id | item_id | name | price | category_name | ++-------------+---------+------------------+--------+---------------+ +| 1 | 1 | ローマのテーブル | 150000 | 家具 | +| 1 | 4 | 魅惑の椅子 | 100000 | 家具 | ++-------------+---------+------------------+--------+---------------+ +2 rows in set (0.01 sec) \ No newline at end of file