Compare commits
2 Commits
| Author | SHA1 | Date | |
|---|---|---|---|
| 5a256dcea2 | |||
| d00e04b593 |
@@ -1,25 +0,0 @@
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問1
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CREATE TABLE book_table(book_id INT, book_name VARCHAR(50), author_name VARCHAR(50), price INT, sales_flag INT);
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問2
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INSERT INTO book_table VALUES (10001, 'TwoPeace', '三田英一郎', 420, 1);
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INSERT INTO book_table VALUES (10002, '名探偵金田二', '青山ふみや', 460, 1);
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INSERT INTO book_table VALUES (20001, '坊ちゃま', '冬目漱石', 460, 1);
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INSERT INTO book_table VALUES (30001, '西方見聞録', '不明', 1000, 1);
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INSERT INTO book_table VALUES (40010, '吾輩は犬である', '冬目漱石', 420, 1);
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問3
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SELECT book_name, author_name FROM book_table;
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問4
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UPDATE book_table SET author_name = 'マール=コ-=ポロ' WHERE book_id = 30001;
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UPDATE book_table SET sales_flag = 0 WHERE book_id = 30001;
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問5
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SELECT * FROM book_table WHERE sales_flag = 1;
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問6
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SELECT * FROM book_table WHERE author_name = '冬目漱石' AND price = 420;
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問7
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DELETE FROM book_table WHERE book_id = 20001;
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146
【練習問題】 SQL/Question1/Quetion1.sql
Normal file
146
【練習問題】 SQL/Question1/Quetion1.sql
Normal file
@@ -0,0 +1,146 @@
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mysql> ALTER TABLE book_table MODIFY COLUMN book_id INT COMMENT '書籍ID';
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Query OK, 0 rows affected (0.01 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> ALTER TABLE book_table MODIFY COLUMN book_name VARCHAR(50) COMMENT '書籍名';
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Query OK, 0 rows affected (0.01 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> ALTER TABLE book_table MODIFY COLUMN author_name VARCHAR(50) COMMENT '著者';
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Query OK, 0 rows affected (0.01 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> ALTER TABLE book_table MODIFY COLUMN price INT COMMENT '価格';
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Query OK, 0 rows affected (0.04 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> ALTER TABLE book_table MODIFY COLUMN sales_flag INT COMMENT '販売有無';
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Query OK, 0 rows affected (0.01 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> INSERT INTO book_table VALUES(10001, TwoPeace, 三田英一郎, 420, 1);
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ERROR 1054 (42S22): Unknown column 'TwoPeace' in 'field list'
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mysql> INSERT INTO book_table VALUES(10001, 'TwoPeace', '三田英一郎', 420, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO book_table VALUES(10002, '名探偵金田二', '青山ふみや', 460, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO book_table VALUES(10003, '坊ちゃま', '冬目漱岩', 460, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> UPDATE book_table SET book_id = 20001 WHERE 10003;
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Query OK, 3 rows affected (0.01 sec)
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Rows matched: 3 Changed: 3 Warnings: 0
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mysql> SELECT * FROM book_table;
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+---------+--------------+-------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+--------------+-------------+-------+------------+
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| 20001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 20001 | 名探偵金田二 | 青山ふみや | 460 | 1 |
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| 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 |
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+---------+--------------+-------------+-------+------------+
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3 rows in set (0.00 sec)
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mysql> UPDATE book_table SET book_id = 10001 WHERE price = 420;
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Query OK, 1 row affected (0.00 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> UPDATE book_table SET book_id = 10002 WHERE author_name = '青山ふみや';
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Query OK, 1 row affected (0.00 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> ^C
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mysql> SELECT * FROM book_table;
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+---------+--------------+-------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+--------------+-------------+-------+------------+
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| 10001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 |
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| 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 |
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+---------+--------------+-------------+-------+------------+
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3 rows in set (0.00 sec)
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mysql> INSERT INTO book_table VALUES(30001, '西方見聞録', '不明', 1000, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO book_table VALUES(40010, '吾輩は犬である', '冬目漱岩', 420, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> SELECT * FROM book_table;
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+---------+----------------+-------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+----------------+-------------+-------+------------+
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| 10001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 |
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| 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 |
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| 30001 | 西方見聞録 | 不明 | 1000 | 1 |
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| 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 |
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+---------+----------------+-------------+-------+------------+
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5 rows in set (0.00 sec)
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mysql> SELECT book_name,author_name FROM book_table;
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+----------------+-------------+
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| book_name | author_name |
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+----------------+-------------+
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| TwoPeace | 三田英一郎 |
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| 名探偵金田二 | 青山ふみや |
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| 坊ちゃま | 冬目漱岩 |
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| 西方見聞録 | 不明 |
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| 吾輩は犬である | 冬目漱岩 |
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+----------------+-------------+
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5 rows in set (0.00 sec)
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mysql> UPDATE book_table SET author_name = 'マール＝コー＝ポロ' WHERE book_id = 30001;
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Query OK, 1 row affected (0.00 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> UPDATE book_table SET sales_flag = 0 WHERE book_id = 30001;
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Query OK, 1 row affected (0.01 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> SELECT * FROM book_table;
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+---------+----------------+--------------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+----------------+--------------------+-------+------------+
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| 10001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 |
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| 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 |
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| 30001 | 西方見聞録 | マール＝コー＝ポロ | 1000 | 0 |
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| 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 |
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+---------+----------------+--------------------+-------+------------+
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5 rows in set (0.00 sec)
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mysql> SELECT * FROM book_table where sales_flag = 1;
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+---------+----------------+-------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+----------------+-------------+-------+------------+
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| 10001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 |
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| 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 |
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| 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 |
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+---------+----------------+-------------+-------+------------+
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4 rows in set (0.00 sec)
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mysql> SELECT * FROM book_table where author_name ='冬目漱岩'AND price= 420;
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+---------+----------------+-------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+----------------+-------------+-------+------------+
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| 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 |
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+---------+----------------+-------------+-------+------------+
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1 row in set (0.00 sec)
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mysql> DELETE FROM book_table where book_id = 20001;
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Query OK, 1 row affected (0.00 sec)
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mysql> SELECT * FROM book_table;
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+---------+----------------+--------------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+----------------+--------------------+-------+------------+
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| 10001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 |
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| 30001 | 西方見聞録 | マール＝コー＝ポロ | 1000 | 0 |
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| 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 |
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+---------+----------------+--------------------+-------+------------+
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4 rows in set (0.00 sec)
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122
【練習問題】 SQL/Question2/Question2.sql
Normal file
122
【練習問題】 SQL/Question2/Question2.sql
Normal file
@@ -0,0 +1,122 @@
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mysql> CREATE TABLE item_category (category_id INT,category_name VARCHAR(256));
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Query OK, 0 rows affected (0.02 sec)
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mysql> INSERT INTO item_category VALUES (1,'家具');
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO item_category VALUES (2,'飲料');
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO item_category VALUES (3,'食品');
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Query OK, 1 row affected (0.05 sec)
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mysql> SELECT * FROM item_category;
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+-------------+---------------+
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| category_id | category_name |
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+-------------+---------------+
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| 1 | 家具 |
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| 2 | 飲料 |
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| 3 | 食品 |
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+-------------+---------------+
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3 rows in set (0.00 sec)
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mysql> CREATE TABLE items(item_id INT, name VARCHAR(256), price INT, category_id INT);
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Query OK, 0 rows affected (0.02 sec)
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mysql> INSERT INTO items VALUES (1,'ローマのテーブル', 150000, 1);
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Query OK, 1 row affected (0.01 sec)
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mysql> INSERT INTO items VALUES (2,'げーたるーど2000 500ml', 370, 2);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO items VALUES (3,'原始肉', 2500, 3);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO items VALUES (4,'魅惑の椅子', 100000, 1);
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Query OK, 1 row affected (0.05 sec)
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mysql> SELECT * FROM items;
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+---------+------------------------+--------+-------------+
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| item_id | name | price | category_id |
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+---------+------------------------+--------+-------------+
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| 1 | ローマのテーブル | 150000 | 1 |
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| 2 | げーたるーど2000 500ml | 370 | 2 |
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| 3 | 原始肉 | 2500 | 3 |
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| 4 | 魅惑の椅子 | 100000 | 1 |
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+---------+------------------------+--------+-------------+
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4 rows in set (0.05 sec)
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mysql> SELECT * FROM item_category LEFT JOIN items USING(category_id);
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+-------------+---------------+---------+------------------------+--------+
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| category_id | category_name | item_id | name | price |
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+-------------+---------------+---------+------------------------+--------+
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| 1 | 家具 | 4 | 魅惑の椅子 | 100000 |
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| 1 | 家具 | 1 | ローマのテーブル | 150000 |
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| 2 | 飲料 | 2 | げーたるーど2000 500ml | 370 |
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| 3 | 食品 | 3 | 原始肉 | 2500 |
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+-------------+---------------+---------+------------------------+--------+
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4 rows in set (0.00 sec)
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mysql> SELECT * FROM item_category RIGHT JOIN items USING(category_id);
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+-------------+---------+------------------------+--------+---------------+
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| category_id | item_id | name | price | category_name |
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+-------------+---------+------------------------+--------+---------------+
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| 1 | 1 | ローマのテーブル | 150000 | 家具 |
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| 2 | 2 | げーたるーど2000 500ml | 370 | 飲料 |
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| 3 | 3 | 原始肉 | 2500 | 食品 |
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| 1 | 4 | 魅惑の椅子 | 100000 | 家具 |
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+-------------+---------+------------------------+--------+---------------+
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4 rows in set (0.00 sec)
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mysql> SELECT * FROM item_category RIGHT JOIN items USING(category_id) ORDER BY price ASC;
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+-------------+---------+------------------------+--------+---------------+
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| category_id | item_id | name | price | category_name |
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+-------------+---------+------------------------+--------+---------------+
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| 2 | 2 | げーたるーど2000 500ml | 370 | 飲料 |
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| 3 | 3 | 原始肉 | 2500 | 食品 |
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| 1 | 4 | 魅惑の椅子 | 100000 | 家具 |
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| 1 | 1 | ローマのテーブル | 150000 | 家具 |
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+-------------+---------+------------------------+--------+---------------+
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4 rows in set (0.00 sec)
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mysql> SELECT * FROM item_category RIGHT JOIN items USING(category_id) where category_name = '家具';
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+-------------+---------+------------------+--------+---------------+
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| category_id | item_id | name | price | category_name |
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+-------------+---------+------------------+--------+---------------+
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| 1 | 1 | ローマのテーブル | 150000 | 家具 |
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| 1 | 4 | 魅惑の椅子 | 100000 | 家具 |
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+-------------+---------+------------------+--------+---------------+
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2 rows in set (0.00 sec)
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mysql> SELECT * FROM item_category RIGHT JOIN items USING(category_id) where price > 1000 AND price < 50000;
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+-------------+---------+--------+-------+---------------+
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| category_id | item_id | name | price | category_name |
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+-------------+---------+--------+-------+---------------+
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| 3 | 3 | 原始肉 | 2500 | 食品 |
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+-------------+---------+--------+-------+---------------+
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1 row in set (0.00 sec)
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mysql> SELECT COUNT(*) AS data_count FROM items;
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+------------+
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| data_count |
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+------------+
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| 4 |
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+------------+
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1 row in set (0.01 sec)
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mysql> SELECT * FROM item_category RIGHT JOIN items USING(category_id) WHERE price = (SELECT MAX(price) FROM items);
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+-------------+---------+------------------+--------+---------------+
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| category_id | item_id | name | price | category_name |
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+-------------+---------+------------------+--------+---------------+
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| 1 | 1 | ローマのテーブル | 150000 | 家具 |
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+-------------+---------+------------------+--------+---------------+
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1 row in set (0.00 sec)
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mysql> SELECT * FROM item_category RIGHT JOIN items USING(category_id) WHERE name LIKE '%の%';
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+-------------+---------+------------------+--------+---------------+
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| category_id | item_id | name | price | category_name |
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+-------------+---------+------------------+--------+---------------+
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| 1 | 1 | ローマのテーブル | 150000 | 家具 |
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| 1 | 4 | 魅惑の椅子 | 100000 | 家具 |
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+-------------+---------+------------------+--------+---------------+
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2 rows in set (0.00 sec)
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@@ -1,37 +0,0 @@
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問1
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CREATE TABLE item_category(category_id INT AUTO_INCREMENT, category_name VARCHAR(256) NOT NULL, PRIMARY KEY (category_id));
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INSERT INTO item_category (category_name) VALUES ('家具');
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INSERT INTO item_category (category_name) VALUES ('飲料');
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INSERT INTO item_category (category_name) VALUES ('食品');
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問2
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CREATE TABLE items(item_id INT AUTO_INCREMENT, name VARCHAR(256) NOT NULL, price INT NOT NULL, category_id INT, PRIMARY KEY (item_id));
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ALTER TABLE items ADD FOREIGN KEY(category_id) REFERENCES item_category(category_id);
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INSERT INTO items(name, price, category_id) VALUES('ローマのテーブル', 150000, 1);
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INSERT INTO items(name, price, category_id) VALUES('げーたるーど2000 500ml', 370, 2);
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INSERT INTO items(name, price, category_id) VALUES('原子肉', 2500, 3);
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INSERT INTO items(name, price, category_id) VALUES('魅惑の椅子', 100000, 1);
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問3
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SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id;
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問4
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SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id ORDER BY items.price ASC;
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問5
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SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id WHERE item_category.category_name = '家具';
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問6
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SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id WHERE price >= 1000 AND price <= 50000;
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問7
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SELECT COUNT(*) AS data_count FROM items;
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問8
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SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id WHERE price = (SELECT MAX(price) FROM items);
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問9
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SELECT item_category.category_id, items.item_id, items.name,items.price, item_category.category_name AS name FROM item_category INNER JOIN items ON item_category.category_id = items.category_id WHERE name LIKE '%の%';
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Reference in New Issue
Block a user