mysql character set exception

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mysql character set exception

问题: 插入数据时,报了这样一个错误:“_mysql_exceptions.Warning: Incorrect string value: ‘\xE6\xB5\x81\xE8\xA1\x8C…’ for column ‘name’ at row 1”. 我使用了中文的数据,看起来就是一个字符集不兼容的错误:Django默认使用UTF-8,而mysqld那边配置是默认使用了latin1 – default collation . 解决办法如下: (1)设置my.cnf vim /etc/mysq…

mysql: Character set 'utf8mb4' is not a compiled character set and is not specified in the '/usr/share/mysql/charsets/Index.xml' file

mysql: Character set 'utf8mb4' is not a compiled character set and is not specified in the '/usr/share/mysql/charsets/Index.xml' file…

mysql死锁com.mysql.cj.jdbc.exception.MYSQLTransactionRollbackException Deadlock found when trying to get lock;try restarting transaction

1.生产环境出现以下报错该错误发生在update操作中,该表并未建立索引,也就是只有InnoDB默认的主键索引,发生错误的程序是for循环中update. 什么情况下会出现Deadlock found when trying to get lock? https://dev.mysql.com/doc/refman/5.6/en/innodb-deadlocks.html 出现死锁需要两个条件: 1)至少2个客户端(a,b)同时在执行事务 2)客户端a锁定了某一行,未提交事务,此时客户端b也需…

MySQL报错： Character set ‘utf8mb4‘ is not a compiled character set and is not specified in the ‘/usr/share/mysql/charsets/Index.xml‘ file

由于日常程序使用了字符集utf8mb4,为了避免每次更新时,set names utf8mb4,就把配置文件改了,如下: [root@~]# vim /etc/my.cnf #my.cnf [client] port = 3306 socket = /home/mysql/mysql.sock default-character-set=utf8mb4 重启MySQL服务,进入mysql时,就报错: [root@~]# mysql Logging to file ‘/home/mysql/que…

MySQL基础知识：Character Set和Collation

A character set is a set of symbols and encodings. A collation is a set of rules for comparing characters in a character set. Character Set: 一套字符及其编码,即字符集:(文中很多地方也用 charset 一词) Collation:在字符集内用于比较或排序字符的一套规则,即校验规则. 操作系统环境为MacOS Catalina, MySQL版本为: 8.0…

mysql python image

连接mysql数据库: cnx = mysql.connector.connect(user='joe', database='test') Connector/Python参数列表 Argument Name Default Description user (username*) The user name used to authenticate with the MySQL server. password (passwd*) The password to authentica…

java 实现mysql数据库导出

package com.zbb.util; import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter; public class MySQLDataba…