MySQL & view
MySql 视图
mysql 视图
https://www.cnblogs.com/chenpi/p/5133648.html
MySql 视图修改
MySql视图view的使用：创建、修改、删除 - IT笔录
https://itbilu.com/database/mysql/E1q5C22_.html#update
注：用 AS 来重命名原始列名
https://blog.csdn.net/pythonkiddz/article/details/55059162
https://blog.csdn.net/moxigandashu/article/details/63254901
https://www.jb51.net/article/36363.htm
SQL & MySQL
http://www.runoob.com/sql/sql-tutorial.html
http://www.runoob.com/mysql/mysql-tutorial.html
# admin
$ net start mysql
$ mysql --help
# login
$ mysql -u root -p pwd123456
# login
$ mysql -u root -p
# pwd123456
# login
$ mysql -u -p
# root
# pwd123456
solution
???
https://dev.mysql.com/doc/refman/5.7/en/resetting-permissions.html
https://dev.mysql.com/doc/refman/5.7/en/password-security-user.html
# help
$ mysql --help
$ mysql -?
$ mysql -I
# version
$ mysql ---version
$ mysql -V
# mysql Ver 14.14 Distrib 5.7.22, for Win64 (x86_64)
not work ???
$ mysql -?
Default options are read from the following files in the given order:
C:WINDOWSmy.ini
C:WINDOWSmy.cnf
C:my.ini
C:my.cnf
H:MySQLmysql-5.7.22-winx64my.ini
H:MySQLmysql-5.7.22-winx64my.cnf
$ mysql --defaults-extra-file=H:/MySQL/mysql-5.7.22-winx64/my.cnf
my.cnf
[client]
user = root
password = pwd123456
host = localhost
my.ini
[mysql]
# 设置mysql客户端默认字符集
default-character-set=utf8
[mysqld]
# 设置3306端口
port = 3306
# 设置mysql的安装目录
basedir=H:MySQLmysql57
# 设置mysql数据库的数据的存放目录
datadir=H:MySQLsqldata
# 允许最大连接数
max_connections=20
# 服务端使用的字符集默认为8比特编码的latin1字符集
character-set-server=utf8
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB
OK
# admin
$ net start mysql
# mysql --user=your-user-name --password=your-password
$ mysql -uroot -p
# password
$ ******
$mysql> show databases;
$mysql> use test;
$mysql> show tables;
$mysql> select * from user;
# beautiful & format
$mysql> select * from user G;