mysql> CREATE DATABASE Q1; Query OK, 1 row affected (0.01 sec) mysql> SHOW DATABASEs; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | q1 | | rezodb | | sys | +--------------------+ 6 rows in set (0.00 sec) mysql> CREATE USER 'rezouser'@'localhost' IDENTIFIED BY 'Rezo_0000'; ERROR 1396 (HY000): Operation CREATE USER failed for 'rezouser'@'localhost' mysql> USE Q1; Database changed mysql> SHOW DATABASEs; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | q1 | | rezodb | | sys | +--------------------+ 6 rows in set (0.01 sec) mysql> CREATE TABLE book_table(book_id INT, book_name VARCHAR(50), author_name VARCHAR(50), price INT, sales_flag INT); Query OK, 0 rows affected (0.03 sec) mysql> SELECT * FROM q1; ERROR 1146 (42S02): Table 'q1.q1' doesn't exist mysql> SHOW tables; +--------------+ | Tables_in_q1 | +--------------+ | book_table | +--------------+ 1 row in set (0.00 sec) mysql> users; 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 'users' at line 1 mysql> DESCRIBE users; ERROR 1146 (42S02): Table 'q1.users' doesn't exist mysql> DESCRIBE book_table; +-------------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------------+-------------+------+-----+---------+-------+ | book_id | int | YES | | NULL | | | book_name | varchar(50) | YES | | NULL | | | author_name | varchar(50) | YES | | NULL | | | price | int | YES | | NULL | | | sales_flag | int | YES | | NULL | | +-------------+-------------+------+-----+---------+-------+ 5 rows in set (0.01 sec) mysql> SELECT * FROM book_table; Empty set (0.00 sec) mysql> INSERT INTO book_table VALUES (10001, 'TwoPeace', '三田英一郎',　420, 1); ERROR 1054 (42S22): Unknown column '　420' in 'field list' mysql> INSERT INTO book_table VALUES (10001, 'TwoPeace', '三田英一郎', 420, 1); Query OK, 1 row affected (0.00 sec) mysql> SHOW tables; +--------------+ | Tables_in_q1 | +--------------+ | book_table | +--------------+ 1 row in set (0.00 sec) mysql> SHOW book_table; 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 'book_table' at line 1 mysql> SELECT * FROM book_table; +---------+-----------+-------------+-------+------------+ | book_id | book_name | author_name | price | sales_flag | +---------+-----------+-------------+-------+------------+ | 10001 | TwoPeace | 三田英一郎 | 420 | 1 | +---------+-----------+-------------+-------+------------+ 1 row in set (0.00 sec) mysql> INSERT INTO book_table VALUES (10002, '名探偵金田二', '青山ふみや', 460, 1); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO book_table VALUES (20001, '坊ちゃま', '冬目漱岩', 460, 1); Query OK, 1 row affected (0.01 sec) mysql> INSERT INTO book_table VALUES (30001, '西方見聞録', '不明', 1000, 1); Query OK, 1 row affected (0.01 sec) mysql> INSERT INTO book_table VALUES (40010, '吾輩は犬である', '冬目漱岩', 420, 1); Query OK, 1 row affected (0.00 sec) mysql> SELECT * FROM book_table; +---------+----------------+-------------+-------+------------+ | book_id | book_name | author_name | price | sales_flag | +---------+----------------+-------------+-------+------------+ | 10001 | TwoPeace | 三田英一郎 | 420 | 1 | | 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 | | 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 | | 30001 | 西方見聞録 | 不明 | 1000 | 1 | | 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 | +---------+----------------+-------------+-------+------------+ 5 rows in set (0.00 sec) mysql> SELECT * FLOM book_table WHERE book_name and author_name; 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 'FLOM book_table WHERE book_name and author_name' at line 1 mysql> SELECT * FLOM book_table WHERE book_name AND author_name; 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 'FLOM book_table WHERE book_name AND author_name' at line 1 mysql> SELECT * FLOM book_table WHERE book_name AND author_name; 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 'FLOM book_table WHERE book_name AND author_name' at line 1 mysql> SELECT book_id,author_name; ERROR 1054 (42S22): Unknown column 'book_id' in 'field list' mysql> SELECT * FLOM 'book_table' WHERE CONCAT(book_name, author_name); 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 'FLOM 'book_table' WHERE CONCAT(book_name, author_name)' at line 1 mysql> SELECT book_name, author_name FROM book_table; +----------------+-------------+ | book_name | author_name | +----------------+-------------+ | TwoPeace | 三田英一郎 | | 名探偵金田二 | 青山ふみや | | 坊ちゃま | 冬目漱岩 | | 西方見聞録 | 不明 | | 吾輩は犬である | 冬目漱岩 | +----------------+-------------+ 5 rows in set (0.00 sec) mysql> UPDATE book_table set book_id = 30001 set author_name = 'マール＝コー＝ポロ' set sales_flag = 0 WHERE book_name = '西方見聞録'; 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 'set author_name = 'マール＝コー＝ポロ' set sales_flag = 0 WHERE book_na' at line 1 mysql> UPDATE book_table set book_id = 30001, author_name = 'マール＝コー＝ポロ', sales_flag = 0 WHERE book_name = '西方見聞録'; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> SELECT * FROM book_table; +---------+----------------+--------------------+-------+------------+ | book_id | book_name | author_name | price | sales_flag | +---------+----------------+--------------------+-------+------------+ | 10001 | TwoPeace | 三田英一郎 | 420 | 1 | | 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 | | 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 | | 30001 | 西方見聞録 | マール＝コー＝ポロ | 1000 | 0 | | 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 | +---------+----------------+--------------------+-------+------------+ 5 rows in set (0.00 sec) mysql> SELECT * FROM book_table WHERE sales_flag = 1; +---------+----------------+-------------+-------+------------+ | book_id | book_name | author_name | price | sales_flag | +---------+----------------+-------------+-------+------------+ | 10001 | TwoPeace | 三田英一郎 | 420 | 1 | | 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 | | 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 | | 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 | +---------+----------------+-------------+-------+------------+ 4 rows in set (0.00 sec) mysql> SELECT * FROM book_table WHERE book_name = '冬目漱岩' AND price = 420; Empty set (0.00 sec) mysql> SELECT * FROM book_table; +---------+----------------+--------------------+-------+------------+ | book_id | book_name | author_name | price | sales_flag | +---------+----------------+--------------------+-------+------------+ | 10001 | TwoPeace | 三田英一郎 | 420 | 1 | | 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 | | 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 | | 30001 | 西方見聞録 | マール＝コー＝ポロ | 1000 | 0 | | 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 | +---------+----------------+--------------------+-------+------------+ 5 rows in set (0.00 sec) mysql> SELECT * FROM book_table WHERE book_name = '冬目漱岩' AND price = 420; Empty set (0.00 sec) mysql> SELECT book_table WHERE book_name = '冬目漱岩' AND price = 420; ERROR 1054 (42S22): Unknown column 'book_table' in 'field list' mysql> SELECT * FROM book_table WHERE author_name = '冬目漱岩' AND price = 420; +---------+----------------+-------------+-------+------------+ | book_id | book_name | author_name | price | sales_flag | +---------+----------------+-------------+-------+------------+ | 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 | +---------+----------------+-------------+-------+------------+ 1 row in set (0.00 sec) mysql> DELETE FROM book_table WHERE book_id = 20001; Query OK, 1 row affected (0.01 sec) mysql> SELECT * FROM book_table; +---------+----------------+--------------------+-------+------------+ | book_id | book_name | author_name | price | sales_flag | +---------+----------------+--------------------+-------+------------+ | 10001 | TwoPeace | 三田英一郎 | 420 | 1 | | 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 | | 30001 | 西方見聞録 | マール＝コー＝ポロ | 1000 | 0 | | 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 | +---------+----------------+--------------------+-------+------------+ 4 rows in set (0.00 sec)