mysql8基礎 primary key auto_increment 創建主鍵、自增長的字段

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

 

數據，數據，命根就在數據 ! 操作數據庫時，一定要謹慎小心。師萬物 的代碼看看就好，要有自己的判斷。遇到抉擇，要不恥上下問。

 

example

stu@Ubuntu:~$ mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 25
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> use db_chinese_medicine;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> create table `t_primary_auto_test`(
    -> `id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT '主鍵,自增長',           
    -> PRIMARY KEY (`id`)                                                           
    -> )                                                                            
    -> ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='測試表';                                                                       
Query OK, 0 rows affected (0.10 sec)

mysql> desc t_primary_auto_test;
+-------+------------------+------+-----+---------+----------------+
| Field | Type             | Null | Key | Default | Extra          |
+-------+------------------+------+-----+---------+----------------+
| id    | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
+-------+------------------+------+-----+---------+----------------+
1 row in set (0.01 sec)

mysql> exit
Bye
stu@Ubuntu:~$ 

 

reference

• https://blog.csdn.net/weixin_41542329/article/details/79003061

 

resource

• [手冊] dev.mysql.com/doc
• [源碼] downloads.mysql.com/archives/community
• [Bug ] bugs.mysql.com
• [ 測試數據 ] github.com/datacharmer/test_db
• [規範 - 參考] yq.aliyun.com/articles/69327
• [排名 - 參考] db-engines.com/en
• [平臺] www.csdn.net

 

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MySQL是關係型數據庫管理系統，目前是開源的(2019-02)。
明確權限，恰當地選擇引擎與字符集等，規範命名。
MariaDB，Redis，MongoDB，PostgreSQL，Hive，HBase等，多作了解，拓寬心量。
Workbench，phpMyAdmin，Navicat等圖形化管理工具，豫兮若冬涉川。