mysql Fatal error encountered during command execution
由于在操作中使用了自定义参数。
所以得在连接字符串中加上Allow User Variables=True;
表示允许用户自定义参数。
There are two ways of constructing a software design.One is to make it so simple that there are obviously no deficiencies;the other is to make it so complicated that there are no obvious deficiencies.