MYC19891010的专栏

1、检查字符集 SHOW VARIABLES WHERE Variable_name LIKE 'character\_set\_%' OR Variable_name LIKE 'collation%'; 2、MySQL字符集设置 • 系统变量： – character_set_server：默认的内部操作字符集 – character_set_client：客户端来源数据使用

错误：java.sql.SQLException  MESSAGE: null, message from server: "Host 'xxx.xxx.xxx.xx' is blocked because of many connection errors; unblock with 'mysqladmin flush- 1、进入mysql安装目录用mysqladmin命令执行 fl