MySQL（一）

mysql命令

一、初试命令：

show databases; # 查看当前Mysql都有那些数据，根目录都有那些文件夹

create database 数据库名; # 创建文件夹

use 数据库名; # 使用选中数据库，进入目录

show tables; # 查看当前数据库下都有那些表，

create table 表名(nid int,name varchar(20), pwd varchar(64)); # 创建数据库表

select * from 表名; # 查看表中的所有数据

insert into 表名(nid,name,pwd) values(1,‘alex‘,‘123‘); # 插入数据

select * from 表名;

示例：

 1 [[email protected] ~]# mysql -uroot -p  #再输入密码
 2 Welcome to the MySQL monitor.  Commands end with ; or \g.
 3 Your MySQL connection id is 4
 4 Server version: 5.5.49 MySQL Community Server (GPL)
 5
 6 Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
 7
 8 Oracle is a registered trademark of Oracle Corporation and/or its
 9 affiliates. Other names may be trademarks of their respective
10 owners.
11
12 Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
13
14
15 #创建数据库
16 mysql> create database test1;
17 Query OK, 1 row affected (0.02 sec)
18
19
20 #进入test1库中
21 mysql> use test1;
22 Database changed
23
24 #创建表tb1（nid和name字段）
25 mysql> create table tb1(nid int,name varchar(20));
26 Query OK, 0 rows affected (0.06 sec)
27
28 #创建tb2 （nid和name字段）
29 mysql> create table tb2(nid int,name varchar(20));
30 Query OK, 0 rows affected (0.01 sec)
31
32 #查看表
33 mysql> show tables;
34 +-----------------+
35 | Tables_in_test1 |
36 +-----------------+
37 | tb1             |
38 | tb2             |
39 +-----------------+
40 2 rows in set (0.01 sec)
41
42 #查看所有表
43 mysql> select * from tb1;
44 Empty set (0.01 sec)
45
46 #往表中插入数据
47 mysql> insert into tb1(nid,name)values(1,‘alex‘);
48 Query OK, 1 row affected (0.01 sec)
49
50 #往表中插入数据
51 mysql> insert into tb1(nid,name)values(1,‘eric‘);
52 Query OK, 1 row affected (0.01 sec)
53
54 #查看所有表
55 mysql> select * from tb1;
56 +------+------+
57 | nid  | name |
58 +------+------+
59 |    1 | alex |
60 |    1 | eric |
61 +------+------+
62 2 rows in set (0.00 sec)
63
64 #退出
65 mysql> exit
66 Bye

二、用户授权

用户管理特殊命令：

创建用户
create user ‘用户名‘@‘IP地址‘ identified by ‘密码‘;

删除用户
drop user ‘用户名‘@‘IP地址‘;

修改用户
rename user ‘用户名‘@‘IP地址‘; to ‘新用户名‘@‘IP地址‘;;

修改密码
set password for ‘用户名‘@‘IP地址‘ = Password(‘新密码‘)