MySQL-5.5操作命令简单练习
admin
2023-05-19 20:02:30
0次

本文主要给大家简单讲讲MySQL-5.5操作命令简单练习，相关专业术语大家可以上网查查或者找一些相关书籍补充一下，这里就不涉猎了，我们就直奔主题吧，希望MySQL-5.5操作命令简单练习这篇文章可以给大家带来一些实际帮助。

1. 数据定义语句 DDL

create （database | table | index）

drop （database | table | index）

alter （database | table）

rename （table）


1.1 create

mysql> create database school;
Query OK, 1 row affected (0.00 sec)

mysql> show create database school;
+----------+-----------------------------------------------------------------+
| Database | Create Database                                                 |
+----------+-----------------------------------------------------------------+
| school   | CREATE DATABASE `school` /*!40100 DEFAULT CHARACTER SET utf8 */ |
+----------+-----------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> use school;
Database changed
mysql> 
mysql> create table student(
    -> `id` int(5) not null auto_increment,
    -> `name` char(20) not null,
    -> `sex` char(5) not null,
    -> `age` tinyint(2) not null default '0',
    -> primary key(id),
    -> key index_name(name));
Query OK, 0 rows affected (0.02 sec)

mysql> desc student;
+-------+------------+------+-----+---------+----------------+
| Field | Type       | Null | Key | Default | Extra          |
+-------+------------+------+-----+---------+----------------+
| id    | int(5)     | NO   | PRI | NULL    | auto_increment |
| name  | char(20)   | NO   | MUL | NULL    |                |
| sex   | char(5)    | NO   |     | NULL    |                |
| age   | tinyint(2) | NO   |     | NULL    |                |
+-------+------------+------+-----+---------+----------------+
4 rows in set (0.00 sec)

mysql> show create table student\G
*************************** 1. row ***************************
       Table: student
Create Table: CREATE TABLE `student` (
  `id` int(5) NOT NULL AUTO_INCREMENT,
  `name` char(20) NOT NULL,
  `sex` char(5) NOT NULL,
  `age` tinyint(2) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`),
  KEY `index_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
1 row in set (0.00 sec)

mysql> create index index_age on student(age);
Query OK, 0 rows affected (0.12 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> desc student;                          
+-------+------------+------+-----+---------+----------------+
| Field | Type       | Null | Key | Default | Extra          |
+-------+------------+------+-----+---------+----------------+
| id    | int(5)     | NO   | PRI | NULL    | auto_increment |
| name  | char(20)   | NO   | MUL | NULL    |                |
| sex   | char(5)    | NO   |     | NULL    |                |
| age   | tinyint(2) | NO   | MUL | NULL    |                |
+-------+------------+------+-----+---------+----------------+
4 rows in set (0.00 sec)


1.2 drop

mysql> use school;
Database changed
mysql> 
mysql> show tables;
+------------------+
| Tables_in_school |
+------------------+
| student          |
| test01           |
| test02           |
+------------------+
3 rows in set (0.00 sec)
mysql> 
mysql> drop table test01;
Query OK, 0 rows affected (0.00 sec)

mysql> show tables;      
+------------------+
| Tables_in_school |
+------------------+
| student          |
| test02           |
+------------------+
2 rows in set (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| school             |
| test               |
+--------------------+
5 rows in set (0.00 sec)

mysql> drop database test;
Query OK, 0 rows affected (0.12 sec)

mysql> show databases;    
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| school             |
+--------------------+
4 rows in set (0.00 sec)

mysql> use school;
Database changed
mysql> 
mysql> desc student;
+-------+------------+------+-----+---------+----------------+
| Field | Type       | Null | Key | Default | Extra          |
+-------+------------+------+-----+---------+----------------+
| id    | int(5)     | NO   | PRI | NULL    | auto_increment |
| name  | char(20)   | NO   | MUL | NULL    |                |
| sex   | char(5)    | NO   |     | NULL    |                |
| age   | tinyint(2) | NO   | MUL | NULL    |                |
+-------+------------+------+-----+---------+----------------+
4 rows in set (0.00 sec)

mysql> drop index index_age on student;
Query OK, 0 rows affected (0.00 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> desc student;                   
+-------+------------+------+-----+---------+----------------+
| Field | Type       | Null | Key | Default | Extra          |
+-------+------------+------+-----+---------+----------------+
| id    | int(5)     | NO   | PRI | NULL    | auto_increment |
| name  | char(20)   | NO   | MUL | NULL    |                |
| sex   | char(5)    | NO   |     | NULL    |                |
| age   | tinyint(2) | NO   |     | NULL    |                |
+-------+------------+------+-----+---------+----------------+
4 rows in set (0.00 sec)


1.3 alter

mysql> show create database test;
+----------+---------------------------------------------------------------+
| Database | Create Database                                               |
+----------+---------------------------------------------------------------+
| test     | CREATE DATABASE `test` /*!40100 DEFAULT CHARACTER SET utf8 */ |
+----------+---------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> alter database test CHARACTER SET GBK COLLATE gbk_chinese_ci; # 改库的字符集
Query OK, 1 row affected (0.00 sec) 

mysql> show create database test;                                   
+----------+--------------------------------------------------------------+
| Database | Create Database                                              |
+----------+--------------------------------------------------------------+
| test     | CREATE DATABASE `test` /*!40100 DEFAULT CHARACTER SET gbk */ |
+----------+--------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> show character set;
+----------+-----------------------------+---------------------+--------+
| Charset  | Description                 | Default collation   | Maxlen |
+----------+-----------------------------+---------------------+--------+
| big5     | Big5 Traditional Chinese    | big5_chinese_ci     |      2 |
| dec8     | DEC West European           | dec8_swedish_ci     |      1 |
| cp850    | DOS West European           | cp850_general_ci    |      1 |
| hp8      | HP West European            | hp8_english_ci      |      1 |
| koi8r    | KOI8-R Relcom Russian       | koi8r_general_ci    |      1 |
| latin1   | cp1252 West European        | latin1_swedish_ci   |      1 |
| latin2   | ISO 8859-2 Central European | latin2_general_ci   |      1 |
| gbk      | GBK Simplified Chinese      | gbk_chinese_ci      |      2 |
| latin5   | ISO 8859-9 Turkish          | latin5_turkish_ci   |      1 |
| armscii8 | ARMSCII-8 Armenian          | armscii8_general_ci |      1 |
| utf8     | UTF-8 Unicode               | utf8_general_ci     |      3 |


mysql> desc test01;
+-------+--------+------+-----+---------+-------+
| Field | Type   | Null | Key | Default | Extra |
+-------+--------+------+-----+---------+-------+
| id    | int(4) | NO   | PRI | 0       |       |
| fit   | int(5) | YES  | MUL | NULL    |       |
+-------+--------+------+-----+---------+-------+
2 rows in set (0.00 sec)

mysql> alter table test01 drop primary key;
Query OK, 0 rows affected (0.17 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> desc test01;
+-------+--------+------+-----+---------+-------+
| Field | Type   | Null | Key | Default | Extra |
+-------+--------+------+-----+---------+-------+
| id    | int(4) | NO   |     | 0       |       |
| fit   | int(5) | YES  | MUL | NULL    |       |
+-------+--------+------+-----+---------+-------+
2 rows in set (0.00 sec)

mysql> alter table test01 drop index index_fit;
Query OK, 0 rows affected (0.00 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> desc test01;
+-------+--------+------+-----+---------+-------+
| Field | Type   | Null | Key | Default | Extra |
+-------+--------+------+-----+---------+-------+
| id    | int(4) | NO   |     | 0       |       |
| fit   | int(5) | YES  |     | NULL    |       |
+-------+--------+------+-----+---------+-------+
2 rows in set (0.00 sec)

mysql> select * from student;
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |  13 |
|  2 | 小南   | 女  |  13 |
|  3 | 小北   | 男  |  13 |
|  4 | 小西   | 女  |  13 |
+----+--------+-----+-----+
4 rows in set (0.10 sec)

mysql> alter table student drop age;
Query OK, 4 rows affected (0.16 sec)
Records: 4  Duplicates: 0  Warnings: 0

mysql> 
mysql> select * from student;                 
+----+--------+-----+
| id | name   | sex |
+----+--------+-----+
|  1 | 小东   | 男  |
|  2 | 小南   | 女  |
|  3 | 小北   | 男  |
|  4 | 小西   | 女  |
+----+--------+-----+
4 rows in set (0.00 sec)

mysql> alter table student add age tinyint(2) not null;
Query OK, 4 rows affected (0.10 sec)
Records: 4  Duplicates: 0  Warnings: 0

mysql> select * from student;                          
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |   0 |
|  2 | 小南   | 女  |   0 |
|  3 | 小北   | 男  |   0 |
|  4 | 小西   | 女  |   0 |
+----+--------+-----+-----+
4 rows in set (0.00 sec)


1.4 rename

mysql> show tables;
+------------------+
| Tables_in_school |
+------------------+
| student          |
+------------------+
1 row in set (0.00 sec)

mysql> rename table student to boy;
Query OK, 0 rows affected (0.00 sec)

mysql> show tables;                
+------------------+
| Tables_in_school |
+------------------+
| boy              |
+------------------+
1 row in set (0.00 sec)


2. 数据操作语句 DML

insert

select

update

delete


2.1 insert

mysql> insert into student(name,sex,age) values('小东','男','13'),('小南','女','13');
Query OK, 2 rows affected (0.02 sec)
Records: 2  Duplicates: 0  Warnings: 0
mysql> 
mysql> select * from student;
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |  13 |
|  2 | 小南   | 女  |  13 |
+----+--------+-----+-----+
2 rows in set (0.00 sec)

mysql> insert into student values(3,'小北','男','13'),(4,'小西','女','13');      
Query OK, 2 rows affected (0.00 sec)
Records: 2  Duplicates: 0  Warnings: 0

mysql> select * from student;
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |  13 |
|  2 | 小南   | 女  |  13 |
|  3 | 小北   | 男  |  13 |
|  4 | 小西   | 女  |  13 |
+----+--------+-----+-----+
4 rows in set (0.00 sec)



2.2 select

mysql> select * from student;                        
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |   0 |
|  2 | 小南   | 女  |   0 |
|  3 | 小北   | 女  |  12 |
|  4 | 小西   | 女  |  13 |
+----+--------+-----+-----+
4 rows in set (0.00 sec)

mysql> select * from student where name='小北';
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  3 | 小北   | 女  |  12 |
+----+--------+-----+-----+
1 row in set (0.00 sec)

mysql> select user,host from mysql.user;
+------+-----------+
| user | host      |
+------+-----------+
| root | 127.0.0.1 |
| root | localhost |
+------+-----------+
2 rows in set (0.00 sec)

mysql> select user,host from mysql.user where user='root' and host='localhost';
+------+-----------+
| user | host      |
+------+-----------+
| root | localhost |
+------+-----------+
1 row in set (0.00 sec)


2.3 update

mysql> update student set age=13 where id=4;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from student;
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |   0 |
|  2 | 小南   | 女  |   0 |
|  3 | 小北   | 男  |   0 |
|  4 | 小西   | 女  |  13 |
+----+--------+-----+-----+
4 rows in set (0.00 sec)
mysql> update student set sex='女',age=12 where id=3;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from student;                        
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |   0 |
|  2 | 小南   | 女  |   0 |
|  3 | 小北   | 女  |  12 |
|  4 | 小西   | 女  |  13 |
+----+--------+-----+-----+
4 rows in set (0.00 sec)


2.4 delete

mysql> select * from student;                        
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |   0 |
|  2 | 小南   | 女  |   0 |
|  3 | 小北   | 女  |  12 |
|  4 | 小西   | 女  |  13 |
+----+--------+-----+-----+
4 rows in set (0.00 sec)

mysql> delete from student where id=4;
Query OK, 1 row affected (0.00 sec)

mysql> select * from student;                  
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |   0 |
|  2 | 小南   | 女  |   0 |
|  3 | 小北   | 女  |  12 |
+----+--------+-----+-----+
3 rows in set (0.00 sec)

mysql> delete from student where name='小南';
Query OK, 1 row affected (0.00 sec)

mysql> select * from student;                
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |   0 |
|  3 | 小北   | 女  |  12 |
+----+--------+-----+-----+
2 rows in set (0.00 sec)


3. 数据库管理语句

show

create user

grant

revoke


3.1 show

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| school             |
+--------------------+
4 rows in set (0.00 sec)

mysql> use school;
Database changed
mysql> show tables;
+------------------+
| Tables_in_school |
+------------------+
| student          |
+------------------+
1 row in set (0.00 sec)

mysql> show create database school;
+----------+-----------------------------------------------------------------+
| Database | Create Database                                                 |
+----------+-----------------------------------------------------------------+
| school   | CREATE DATABASE `school` /*!40100 DEFAULT CHARACTER SET utf8 */ |
+----------+-----------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> show create table student\G
*************************** 1. row ***************************
       Table: student
Create Table: CREATE TABLE `student` (
  `id` int(5) NOT NULL AUTO_INCREMENT,
  `name` char(20) NOT NULL,
  `sex` char(5) NOT NULL,
  `age` tinyint(2) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `index_name` (`name`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8
1 row in set (0.00 sec)

mysql> select user,host from mysql.user;
+------+-----------+
| user | host      |
+------+-----------+
| root | 127.0.0.1 |
| root | localhost |
+------+-----------+
2 rows in set (0.00 sec)

mysql> show grants for root@localhost;  
+----------------------------------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost                                                                                                              |
+----------------------------------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '*23AE809DDACAF96AF0FD78ED04B6A265E05AA257' WITH GRANT OPTION |
| GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION                                                                           |
+----------------------------------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)


3.2 create user

mysql> select user,host,password from mysql.user;
+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
| root | 127.0.0.1 |                                           |
+------+-----------+-------------------------------------------+
2 rows in set (0.00 sec)

mysql> 
mysql> create user logen@'192.168.0.%' identified by '123';
Query OK, 0 rows affected (0.00 sec)

mysql> select user,host,password from mysql.user;          
+-------+-------------+-------------------------------------------+
| user  | host        | password                                  |
+-------+-------------+-------------------------------------------+
| root  | localhost   | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
| root  | 127.0.0.1   |                                           |
| logen | 192.168.0.% | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
+-------+-------------+-------------------------------------------+
3 rows in set (0.00 sec)

mysql> select user,host,password from mysql.user;
+-------+-------------+-------------------------------------------+
| user  | host        | password                                  |
+-------+-------------+-------------------------------------------+
| root  | localhost   | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
| root  | 127.0.0.1   |                                           |
| logen | 192.168.0.% | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
+-------+-------------+-------------------------------------------+
3 rows in set (0.00 sec)

mysql> drop user logen@'192.168.0.%';            
Query OK, 0 rows affected (0.00 sec)

mysql> select user,host,password from mysql.user;
+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
| root | 127.0.0.1 |                                           |
+------+-----------+-------------------------------------------+
2 rows in set (0.00 sec)


3.3 grant

mysql> grant insert,delete,update,select on school.student to logen@'192.168.0.%' identified by '123';
Query OK, 0 rows affected (0.00 sec)

mysql> show grants for logen@'192.168.0.%';                                      +----------------------------------------------------------------------------------------------------------------+
| Grants for logen@192.168.0.%                                                                                   |
+----------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'logen'@'192.168.0.%' IDENTIFIED BY PASSWORD '*23AE809DDACAF96AF0FD78ED04B6A265E05AA257' |
| GRANT SELECT, INSERT, UPDATE, DELETE ON `school`.`student` TO 'logen'@'192.168.0.%'                            |
+----------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)


[root@SQL-S1 ~]# mysql -h292.168.0.88 -ulogen -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.5.55-log MySQL Community Server (GPL)

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| school             |
+--------------------+
2 rows in set (0.00 sec)

mysql> use school;
Database changed
mysql> 
mysql> show tables;
+------------------+
| Tables_in_school |
+------------------+
| student          |
+------------------+
1 row in set (0.00 sec)

mysql> 
mysql> select * from student;
+----+--------+-----+-----+
| id | name   | sex | age |
+----+--------+-----+-----+
|  1 | 小东   | 男  |   0 |
|  3 | 小北   | 女  |  12 |
+----+--------+-----+-----+
2 rows in set (0.00 sec)


3.4 revoke

mysql> revoke all on school.student from logen@'192.168.0.%';
Query OK, 0 rows affected (0.00 sec)

mysql> show grants for logen@'192.168.0.%';                  
+----------------------------------------------------------------------------------------------------------------+
| Grants for logen@192.168.0.%                                                                                   |
+----------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'logen'@'192.168.0.%' IDENTIFIED BY PASSWORD '*23AE809DDACAF96AF0FD78ED04B6A265E05AA257' |
+----------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

[root@SQL-S1 ~]# mysql -h292.168.0.88 -ulogen -p 
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.5.55-log MySQL Community Server (GPL)

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
+--------------------+
1 row in set (0.00 sec)

MySQL-5.5操作命令简单练习就先给大家讲到这里，对于其它相关问题大家想要了解的可以持续关注我们的行业资讯。我们的板块内容每天都会捕捉一些行业新闻及专业知识分享给大家的。

上一篇：爆料关于皮皮斗地主透视辅助挂下载,吉祥麻将挂是真的假的(真的有挂)-知乎

下一篇：MySQL-5.5的二进制包是如何安装的

相关内容

热门资讯

牛蛙抗生素超标5倍，真把消费者... 文 | 心 冥深夜嗦蛙一时爽，一看检测报告“火葬场”。近日，“抗生素牛蛙”冲上热搜，给人看得一哆嗦，...
男子外出喝酒后深夜被人送回，家... 2025年8月21日，甘肃陇西县47岁男子张某某外出与人喝酒，其父母多次电话寻人，电话多由他人接听。...
安德烈·科尔图诺夫：当资本主义... 【文/观察者网专栏作者 安德烈·科尔图诺夫】 两千年前，蒙爱圣徒约翰警示所有罪人和无信之人：“拒绝把...
华为WATCH GT 7手表真... IT之家 8 月 3 日消息，华为 WATCH GT 7 系列手表新品海报今日登陆各大城市大屏，宣传...
大脑也有“带宽”瓶颈？他们发现... 原标题：开辟脑机接口“通信带宽”增强新范式（“咖”说科技） 人类大脑与物理世界之间存在“通信带宽”。...
招致强烈反对后，法庭临时叫停以... 【环球网报道 记者 李飒】据《以色列时报》《耶路撒冷邮报》等以媒8月2日报道，耶路撒冷地方法院当天发...
韩国 “赏月号” 探测器将观测... 8月3日，财闻海外资讯消息，SpaceX猎鹰9号火箭上面级残骸将于8月5日撞击月球表面，韩国首枚月球...
日本熊本商场爆炸，两名女员工本... 据凤凰卫视报道，日本熊本县嘉岛町永旺购物中心在强震后发生爆炸，造成7人死亡。公司高层8月2日晚出席遇...
AI圈最会“追风”的男人，杀入... 作者丨晨阳 编辑丨小龙 离开英伟达一个月后，贾扬清带着新公司Intent Lab杀回了战场。 没有...
小米汽车：澎程的长滑轨在损耗特... 来源：环球网 【环球网科技综合报道】8月3日，小米汽车在回答用户关于“车内的长滑轨用久了会不会出异响...