关于mysql 密码，编码问题

打开cmd终端，启动mysql，执行命令 net start mysql;

以root用户身份登录

mysql -u -root -p;

如果报错，

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

是应为在mysql5.6版本以后，就需要输入密码了，

设置新密码，123，下次再登录的时候就要输入密码123，

mysql> set password for root@localhost = password('123');
Query OK, 0 rows affected, 1 warning (0.29 sec)

=====

查看数据库  ，可以看到已经创建的表

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| bookmanage1        |
| bookmanage2        |
| db1                |
| db2                |
| gu_orm             |
| myorm              |
| mysql              |
| performance_schema |
| s5orm              |
| school             |
| sys                |
+--------------------+
12 rows in set (0.06 sec)

选择自己要修改的编码的  数据库，然后可以看到表的表的信息，进行修改

mysql> use gu_orm;
Database changed
mysql> s
--------------
mysql  Ver 14.14 Distrib 5.7.18, for Win64 (x86_64)

Connection id:          70
Current database:       gu_orm
Current user:           root@localhost
SSL:                    Not in use
Using delimiter:        ;
Server version:         5.7.18 MySQL Community Server (GPL)
Protocol version:       10
Connection:             localhost via TCP/IP
Server characterset:    latin1
Db     characterset:    latin1
Client characterset:    gbk
Conn.  characterset:    gbk
TCP port:               3306
Uptime:                 14 hours 39 min 56 sec

Threads: 4  Questions: 860  Slow queries: 0  Opens: 365  Flush tables: 1  Open tables: 256  Queries per second avg: 0.016
--------------

mysql> set character_set_client=utf8;------修改编码
Query OK, 0 rows affected (0.05 sec)

修改数据库的字符集mysql>use mydb

mysql>alter database mydb character set utf8;

创建数据库指定数据库的字符集

mysql>create database mydb character set utf8;