Error Code: 1175.You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column.

在MySQL Workbench里面使用SQL语句：

delete from 表名

提示出错：

Error Code: 1175.You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column.

这是因为设置的是safe update mode，必须跟where。

解决方法有两个：

1. 运行SET SQL_SAFE_UPDATES=0; 

2. 打开Edit->Preferences->SQL Queries，取消“Safe Updates”前面的勾。