mysql提示:Illegal mix of collations for operation ‘UNION’

http://www.111cn.net/database/mysql/56096.htm

show variables like "%char%";

show variables like "%coll%";

 

而后将数据库中全部编码方式改成统一：

 

代码以下	复制代码
mysql> set character_set_database=utf8; Query OK, 0 rows affected (0.00 sec)   mysql> set collation_database= utf8_general_ci

从新查看字符集及数据表字段编码字符是否一致：

总结

utf8_bin
utf8_general_ci
utf8_unicode_ci

utf8_bin 与 utf8_general_ci 能够

utf8_bin 与 utf8_unicode_ci 能够

utf8_general_ci 与 utf8_unicode_ci 不能够