先介绍下标题中的三个锅 sql_mode 以下是MySQL官网文档原文： The MySQL server can operate in different SQL modes, and can apply these modes differently for different clients, depending on the value of the sql_mode system variable. DBAs can set the global SQL mode to match site server operating requirements, and each application can set its session SQL mode to its own… Continue reading MySQL中sql_mode、隐式类型转换、5.6/5.7的默认配置引发的问题