Question

在SQL Server中，我曾经做过类似的事情，为select选择添加额外的列：

select *,
        case
        when w1.start_date < w2.start_date then
            to_date(w2.START_date, 'DD/MM/YYYY') - 1
        else
        to_date(w1.end_date, 'DD/MM/YYYY')
        end as end_date_modified
from WEIGHTED_AVERAGE w1

然而，Oracle中的以下内容导致“找不到ORA-00923 FROM关键字”：

select *,
        case
        when w1.start_date < w2.start_date then
            to_date(w2.START_date, 'DD/MM/YYYY') - 1
        else
        to_date(w1.end_date, 'DD/MM/YYYY')
        end end_date_modified
from WEIGHTED_AVERAGE w1

我已经搜索了所有内容，但无法弄清楚如何在Oracle中实现这一目标。

Answer 1

试试这个

select w1.*,
        case
        when w1.start_date < w2.start_date then
            to_date(w2.START_date, 'DD/MM/YYYY') - 1
        else
        to_date(w1.end_date, 'DD/MM/YYYY')
        end end_date_modified
from WEIGHTED_AVERAGE w1

Answer 2

将SELECT的开头修改为w1。*

添加列以选择*

2 个答案: