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(1) 创建数据库TestDB mysql> create database TestDB;
(2) 制定TestDB数据库为当前默认数据库 mysql> use TestDB;
(3) 在TestDB数据库中创建表customers mysql> create table customers(userid int not null, username varchar(20) not null);
(4) 显示数据库列表 mysql> show databases;
(5)显示数据库中的表 mysql> show tables;
(6)删除表customers mysql> drop table customers;
(7)显示customers表的结构 mysql> desc customers;
(8) 向customers表中插入一条记录 mysql> insert into customers(userid, username) values(1, 'hujiahui');
(9) 让操作及时生效; mysql> commit;
(10) 查询customers中的记录 mysql> select * from customers;
(11) 更新表中的数据 mysql> update customers set username='DennisHu' where userid=1;
(12) 删除表中的记录 mysql> delete from customers;
(13)授予likui用户访问数据库的权限 # grant select, insert, update, delete on *.* to likui@localhost indentified by "123456";
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