一、我们需要将默认的字符集更改为utf-8来解决数据库导入数据的乱码问题。
我们需要先查看数据库默认的字符集是什么：
show variables like 'character_set_%'
查看所有的默认字符集
mysql> show variables like 'character_set_%';
+--------------------------+---------------------------------------------------------+
| Variable_name | Value |
+--------------------------+---------------------------------------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | latin1 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | C:\Program Files\MySQL\MySQL Server 5.7\share\charsets\ |
+--------------------------+---------------------------------------------------------+
8 rows in set, 1 warning (0.01 sec)其中character_set_database和character_set_server的字符集mysql默认为latin1.
我们需要将其更改为utf-8的字符需要用到下面两行代码
set character_set_database=utf8；
set character_set_server=utf8；
然后我们做字符集查询
show variables like 'character_set_%'得到：
mysql> show variables like 'character_set_%';
+--------------------------+---------------------------------------------------------+
| Variable_name | Value |
+--------------------------+---------------------------------------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | C:\Program Files\MySQL\MySQL Server 5.7\share\charsets\ |
+--------------------------+---------------------------------------------------------+
8 rows in set, 1 warning (0.00 sec)之后创建的所有的数据库的字符集都默认为utf-8的字符集
二、更改数据库和表的字符集的方法：
alter database 数据库名 charset utf8；
alter table 数据表名 convert to character set utf8；
三、导入数据库的方法
Windows系统
source d：/table.sql(*.sql文件所处的盘位置)
linux系统
source /home/hhh/桌面/tables.sql;