当运行MySQL update 或者 delete 命令时，报以下错误：
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 Editor and reconnect. 0.000 sec
解决：
MySql运行在safe-updates模式下，该模式会导致非主键条件下无法执行update或者delete命令，
执行命令以下命令修改下数据库模式
SET SQL_SAFE_UPDATES = 0;