sql - 添加要选择的列 *

Question

在 SQL Server 中，我曾经做这样的事情来为选择添加额外的列:

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“ORA-00923 FROM keyword not found where expected”:

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

我到处搜索，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