mysql8基础 create database 创建的数据库的名字是 关键字、特殊字符，用反引号

•        OS : Ubuntu 18.04.1 LTS
•        DBMS : mysql 8.0.12
•        blog : blog.csdn.net/shiwanwu
•  typesetting : Markdown

 

数据，数据，命根就在数据 ! 操作数据库时，一定要谨慎小心。师万物 的代码看看就好，要有自己的判断。遇到抉择，要不耻上下问。

 

example - 错误的

stu@Ubuntu:~$ mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.12 MySQL Community Server - GPL

Copyright (c) 2000, 2018, 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> create database database;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'database' at line 1
mysql> create database @#$%%^&*;
    -> ;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '@' at line 1
mysql> exit
Bye
stu@Ubuntu:~$ 

 

example - 正确的

stu@Ubuntu:~$ mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 8.0.12 MySQL Community Server - GPL

Copyright (c) 2000, 2018, 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> create database `database`;
Query OK, 1 row affected (0.09 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| database           |
| employees          |
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
6 rows in set (0.01 sec)

mysql> create database `@#$%^%`;
Query OK, 1 row affected (0.03 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| @#$%^%             |
| database           |
| employees          |
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
7 rows in set (0.00 sec)

mysql> exit
Bye
stu@Ubuntu:~$ 

 

more knowledge

• 命名一定要规范，见名知意。
• 一个故事：在工作中，将要见到前辈的数据库查询代码时，师万物 很激动的，满心欢喜。当见到了由拼音组成的表名时，瞬间冷却了。
• 使用反引号创建出来的特殊名字数据库，知道有这回事就好。在实际开发中，好好写命名与注释，利人利己。

 

resource

• [手册] dev.mysql.com/doc
• [源码] downloads.mysql.com/archives/community
• [Bug ] bugs.mysql.com
• [ 测试数据 ] github.com/datacharmer/test_db
• [规范 - 参考] yq.aliyun.com/articles/69327
• [排名 - 参考] db-engines.com/en
• [平台] www.csdn.net

 

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MySQL是关系型数据库管理系统，目前是开源的(2019-02)。
明确权限，恰当地选择引擎与字符集等，规范命名。
MariaDB，Redis，MongoDB，PostgreSQL，Hive，HBase等，多作了解，拓宽心量。
Workbench，phpMyAdmin，Navicat等图形化管理工具，豫兮若冬涉川。