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db-lesson/【練習問題】 SQL/Question1/Q1.txt
2026-09-28 13:05:48 +09:00

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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=ポロ' WHERE book_id = 30001;
UPDATE book_table SET sales_flag = 0 WHERE book_id = 30001;
問5
SELECT * FROM book_table WHERE sales_flag = 1;
問6
SELECT * FROM book_table WHERE author_name = '冬目漱岩' AND price = 420;
問7
DELETE FROM book_table WHERE book_id = 20001;