使用MySQL执行update的时候报错：Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Queries and reconnect.

在使用mysql执行update的时候，如果不是用主键当where语句，会报如下错误，使用主键用于where语句中正常。

异常内容：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.
这是因为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SET SQL_SAFE_UPDATES = 0;修改下数据库模式
为测试命令确实成功执行，我们先看执行update命令前的数据状态
执行update命令，可以看出命令执行成功的状态
重新查询数据库值，已经成功更新
如果想要提高数据库安全等级，可以在恢复回原有的设置，执行命令：SET SQL_SAFE_UPDATES = 1;
执行成功后，以delete命令为例，非主键情况下又报错了，说明安全等级修改成功

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两个解决办法, 一: 修改mysql 的preference选项上图: 选中edit,选择preference属性二, 使用SET SQL_SAFE_UPDATES = 0
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使用MySQL执行update的时候报错：Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Queries and reconnect.

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