--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;