Error Code: 1175.You are using safe update mode

今天使用Mysql的update语句时，发现执行不了。
提示信息：
Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Queries and reconnect.

原因：是在safe mode下,要强制安全点,without a WHERE that uses a KEY column To disable safe mode
解决方法：
取消这个限制,执行:
SET SQL_SAFE_UPDATES=0;
即可！