part 1 問1~7 完了

Question1/db.txt

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+■練習問題１
+create table 
+  book_table(
+  book_id INT,
+  author_name VARCHAR(50),
+  price INT,
+  sales_flag INT);
+
+■練習問題 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);
+
+
+■練習問題 3
+SELECT   book_name FROM book_table;
+SELECT   author_name FROM book_table;
+
+■練習問題 4
+UPDATE book_table 
+SET author_name= 'マール＝コー＝ポロ' 
+ where  book_id = 30001;
+UPDATE  book_table 
+SET sales_flag = 0
+ where book_id = 30001;
+
+■練習問題 5
+SELECT * FROM book_table where sales_flag= 1;
+
+■練習問題 6
+SELECT * FROM book_table where author_name ='冬目漱岩' AND price = 420;
+
+■練習問題 7
+DELETE FROM book_table where book_id = 20001;
+
+