MySQL 创建新用户以及导入数据

新建用户

先登录进root用户，然后再利用root用户的权限进行创建用户操作

mysql> create user 'mrc'@'localhost' identified by '123456';

刷新授权：mysql> flush privileges;

为新用户分配权限：mysql> grant all privileges on car.* to mrc@localhost;

建表导入数据（txt）

　　建立pet表：

　　CREATE TABLE pet (name VARCHAR(20), owner VARCHAR(20), species VARCHAR(20), sex CHAR(1), birth DATE, death DATE)；

• 在电脑中准备一个pet.txt文件，里面包含想要导入到pet表的数据。（文件中一行代表一条数据，一条数据中的属性用Tab键隔开）
• 向pet表载入pet.txt中的数据：

  1. mysql> LOAD DATA LOCAL INFILE 'E:Desktoppet.txt' INTO TABLE pet;
     ERROR 1148 (42000): The used command is not allowed with this MySQL version

     ERROR原因：服务器端，local_infile默认开启，客户端local_infile默认关闭，因此用的时候需要打开它

  2. mysql> SHOW VARIABLES like 'local_infile';
     +---------------+-------+
     | Variable_name | Value |
     +---------------+-------+
     | local_infile  | OFF   |
     +---------------+-------+
     1 row in set, 1 warning (0.04 sec)

     开启local_infile：（开启后，再次执行SHOW VARIABLES like 'local_infile'会看到Value为ON）

  3. mysql> SET GLOBAL local_infile=ON;
     Query OK, 0 rows affected (0.00 sec)

     重新载入：

  4. mysql> LOAD DATA LOCAL INFILE 'E:Desktoppet.txt' INTO TABLE pet;
     ERROR 2 (HY000): File 'E:Desktoppet.txt' not found (OS errno 2 - No such file or directory)

     ERROR原因：路径应使用'/'   ， 重新载入：

  5. mysql> LOAD DATA LOCAL INFILE 'E:/Desktop/pet.txt' INTO TABLE pet;
     Query OK, 8 rows affected, 7 warnings (0.02 sec)
     Records: 8  Deleted: 0  Skipped: 0  Warnings: 7　　

     载入完毕，查看载入成功后的pet表：

  6. mysql> select * from pet;
     +----------+--------+---------+------+------------+------------+
     | name     | owner  | species | sex  | birth      | death      |
     +----------+--------+---------+------+------------+------------+
     | Fluffy   | Harold | cat     | f    | 1993-02-04 | 0000-00-00 |
     | Claws    | Gwen   | cat     | m    | 1994-03-17 | 0000-00-00 |
     | Buffy    | Harold | dog     | f    | 1989-05-13 | 0000-00-00 |
     | Fang     | Benny  | dog     | m    | 1990-08-27 | 0000-00-00 |
     | Bowser   | Diane  | dog     | m    | 1979-08-31 | 1995-07-29 |
     | Chirpy   | Gwen   | bird    | f    | 1998-09-11 | 0000-00-00 |
     | Whistler | Gwen   | bird    |      | 1997-12-09 | 0000-00-00 |
     | Slim     | Benny  | snake   | m    | 1996-04-29 | 0000-00-00 |
     +----------+--------+---------+------+------------+------------+
     8 rows in set (0.00 sec