###开发规范
开发规范：关键字大写，库名字小写，要有字符集
CREATE DATABSE oldboy CHARSET utf8; ###建议采用第一种
CREATE DATABSE oldboy CHARSET utf8mb4;
###lower_case_table_names begin###
mysql> show variables like '%lower%';
+------------------------+-------+
| Variable_name | Value |
+------------------------+-------+
| lower_case_file_system | OFF |
| lower_case_table_names | 0 |
+------------------------+-------+
2 rows in set (0.00 sec)
#lower_case_table_names
如果此参数写作1的话表示强制小写，
即使创建的数据库名字为大写也会强制修改为小写
测试：修改/etc/my.cnf文件--->>>>>>>>lower_case_table_names 将该参数置为1
后续操作见代码块
1 #重启数据库 2 [root@db01-sa ~]# /etc/init.d/mysqld restart 3 Shutting down MySQL..... SUCCESS! 4 Starting MySQL.... SUCCESS! 5 #登录数据库 6 [root@db01-sa ~]# mysql -uroot -p123 7 Warning: Using a password on the command line interface can be insecure. 8 Welcome to the MySQL monitor. Commands end with ; or g. 9 Your MySQL connection id is 1 10 Server version: 5.6.38-log Source distribution 11 12 Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. 13 14 Oracle is a registered trademark of Oracle Corporation and/or its 15 affiliates. Other names may be trademarks of their respective 16 owners. 17 18 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. 19 20 mysql> show databases; 21 +--------------------+ 22 | Database | 23 +--------------------+ 24 | information_schema | 25 | mysql | 26 | performance_schema | 27 | test | 28 +--------------------+ 29 4 rows in set (0.05 sec) 30 31 mysql> CREATE DATABASE OLDBOY CHARSET utf8; 32 Query OK, 1 row affected (0.39 sec) 33 34 mysql> show databases; 35 +--------------------+ 36 | Database | 37 +--------------------+ 38 | information_schema | 39 | mysql | 40 | oldboy | 41 | performance_schema | 42 | test | 43 +--------------------+ 44 5 rows in set (0.00 sec)
###lower_case_table_names end###