1：安装（windows下）
官网下载.msi文件
运行安装时只需要安装server就行了
在环境变量中配置到bin目录：e.g:C:\programFile\...mysql\bin
完成后进入windows shell输入net strata mysql56（56为版本号）会提示“请求的服务已开启”or“正在启动....”即是表明配置成功了
2:切记每段SQL语句都以 “ ; ” 结尾！
3：注释
#..... or --............... or COMMENT '......'
4：技巧：shell中键盘的上下键可以调用之前/后输入过的命令
5：一般操作：
mysql -uroot -p; :u后面填写自己的用户名
show databases; :查看有哪些已经存在的数据库
use 数据库名; ：打开一个已近存在的数据库
show tables; :查看当前数据库下有的表
退出：quit/exit
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