check the manual that corresponds to your MySQL server version for the right syntax to use near 解决方法

1. 问题所示

出现如下问题

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 
') NULL COMMENT '实际工时' AFTER 'expected_work_time' at line 2

截图如下所示

2. 原理分析

先讲究一波通用的原理分析

通常是因为输入的SQL语句不符合MySQL的语法规则
错误消息告诉在”near”附近的地方