SQL计算month_diff时报错：extraneous input ')' expecting AS near '<EOF>'

你的SQL代码报错原因是**cast函数的括号使用错误**：

原代码中cast(min(bs.cpd_dt)) as date部分多写了一个右括号，cast的正确语法是cast(表达式 as 数据类型)，多余的括号破坏了语法结构，导致解析器无法识别，触发了extraneous input ')' expecting AS near '<EOF>'错误。

修正后的代码：

months_between(cast(min(bs.cpd_dt) as date), cast(bs.first_prd_cpd_dt as date)) as month_diff

内容的提问来源于stack exchange，提问作者Mdick