character_set_server collation_servercharacter_set_databasecollation_database character_set_clientcharacter_set_results character_set_connection <===character_set_clientcollation_connection skip-character-set-client-handshake client (character_set_cl…

10.1.5 Connection Character Sets and Collations Several character set and collation system variables relate to a client's interaction with the server. Some of these have been mentioned in earlier sections: The server character set and collation are t…

Firebird Character Sets and Collations Every CHAR or VARCHAR field can (or, better: must) have a character set assigned. Firebird uses this information to correctly store the bytes that make up the character string. In order to be able to sort or com…

彻底解决phpcms v9升级后,文章发布出现: MySQL Query : SELECT * FROM `withli_a`.`v9_keyword` WHERE `keyword` = '吼吼' AND `siteid` = '1' LIMIT 1 MySQL Error : Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (gbk_chinese_ci,COERCIBLE) for operation '=' MySQL…

MySQL 中 character set 与 collation 的理解 出处:https://www.cnblogs.com/EasonJim/p/8128196.html 推荐: 编码使用 uft8mb4,不使用 utf8(utf8会有一些问题) utf8_general_ci 与 utf8_unicode_ci 区别 utf8_unicode_ci 和 utf8_general_ci,对中文.英文来说没有实质的差别,用 utf8_general_ci 就可以(因为:utf8_genera…

在利用postGIS导入shapefile文件到postgresql数据库的时候,老是提示字符串的问题,或者是乱码,试了好几种都不行,于是度娘之.... 使用默认的UTF8,提示信息是:建议使用LATIN1:Unable to convert data value to UTF-8 (iconv reports "Illegal byte sequence"). Current encoding is "UTF-8". Try "LATIN1"…

在使用concat连接字符串时出现错误:MySQL Error: Illegal mix of collations for operation 'concat' 原因:字段操作默认为UTF8的编码,应该绝对统一使用UTF-8,而创建数据库时使用了其它编码.  解决方法:在Navicat for MySQL中删除掉原来的数据库,重新新建,新建时设置字符集和排序规则为UTF-8…

在connection的生命里,会一直有一个user thread(以及user thread对应的THD)陪伴它. Connection和Session概念 来自Stackoverflow的一个回答: A session is just a result of a successful connection. Any MySQL client requires some connection settings to establish a connection, and after the c…

David Berube  | June 12, 2018 |  Posted In: MySQL Modern applications often feature the use of data in many different languages. This is often true even of applications that only offer a user facing interface in a single language. Many users may, for…

mysql数据库认证的时候和别的服务器不一样,即使mysqld数据库服务器没有启动,使用mysql这种客户端程序去连接,也要先输入密码,从而使人有一种错觉,以会服务器已经正常启动了.是不是密码或是主机被数据库服务器本身没有授权. 碰到只能用localhost(127.0.0.1)作为访问地址的情况,用ip地址访问就会connectio refused [root@localhost ~]# ps -eaf | grep mysqldroot     27011 25197  0 14:11 pt…