Django：报错 unsupported format character ‘Y‘ (0x59) at index 70

如图报错

错误原因：执行SQL语句中，包含DATE_FORMAT格式化函数，其中包含%Y占位符，其与python中SQL占位符%s冲突。
解决方案：将MySQL中占位符由%Y改为%%Y。m和d同理。即增加一个%百分号

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