mysqld --defaults-file="D:\ProgramFiles\mysql\MySQLServer5.5\my.ini" --skip-grant-tables
use mysql;
update user set authentication_string=password('新密码') where user='root' and Host='localhost';
flush privileges;
bin
目录配置到环境变量path
中| ERROR 1046 (3D000): No database selected |
| ------------------------------------------------------------ |
| 解决方案一:使用“USE 数据库名;”语句,这样接下来的语句就默认针对这个数据库进行操作 |
| 解决方案二:所有的表对象前面都加上“数据库.” |
mysql> INSERT INTO t_stu VALUES(1,'张三','男');
ERROR 1366 (HY000): Incorrect string value: '\xD5\xC5\xC8\xFD' for column 'sname' at row 1
SHOW VARIABLES LIKE 'character_set_%';
SET NAMES GBK;
(1)先停止服务
(2)修改my.ini文件
(3)重新启动服务
my.ini
之前建的库和表,那么库和表的编码还是原来的Latin1
,要么删了重建,要么使用alter
语句修改编码。mysql> create database testdb charset Latin1;
Query OK, 1 row affected (0.00 sec)
mysql> use testdb;
Database changed
mysql> create table student (id int , name varchar(20)) charset Latin1;
Query OK, 0 rows affected (0.02 sec)
mysql> show create table student\G
*************************** 1. row ***************************
Table: student
Create Table: CREATE TABLE `student` (
`id` int(11) NOT NULL,
`name` varchar(20) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
1 row in set (0.00 sec)
mysql> alter table student charset utf8; #修改表字符编码为UTF8
Query OK, 0 rows affected (0.01 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> show create table student\G
*************************** 1. row ***************************
Table: student
Create Table: CREATE TABLE `student` (
`id` int(11) NOT NULL,
`name` varchar(20) CHARACTER SET latin1 DEFAULT NULL, #字段仍然是latin1编码
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
1 row in set (0.00 sec)
mysql> alter table student modify name varchar(20) charset utf8; #修改字段字符编码为UTF8
Query OK, 0 rows affected (0.05 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> show create table student\G
*************************** 1. row ***************************
Table: student
Create Table: CREATE TABLE `student` (
`id` int(11) NOT NULL,
`name` varchar(20) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
1 row in set (0.00 sec)
mysql> show create database testdb;;
+--------+-----------------------------------------------------------------+
|Database| Create Database |
+------+-------------------------------------------------------------------+
|testdb| CREATE DATABASE `testdb` /*!40100 DEFAULT CHARACTER SET latin1 */ |
+------+-------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> alter database testdb charset utf8; #修改数据库的字符编码为utf8
Query OK, 1 row affected (0.00 sec)
mysql> show create database testdb;
+--------+-----------------------------------------------------------------+
|Database| Create Database |
+--------+-----------------------------------------------------------------+
| testdb | CREATE DATABASE `testdb` /*!40100 DEFAULT CHARACTER SET utf8 */ |
+--------+-----------------------------------------------------------------+
1 row in set (0.00 sec)
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。