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：
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mysql> LOAD DATA LOCAL INFILE 'E:\Desktop\pet.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
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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）
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mysql> SET GLOBAL local_infile=ON;Query OK, 0 rows affected (0.00 sec)
重新载入：
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mysql> LOAD DATA LOCAL INFILE 'E:\Desktop\pet.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：
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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：
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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
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