甲骨文整合兩行成列

Question

需要幫助，顯示2行作爲合併列
製造這一形象來說明問題 謝謝你的幫助

Answer 1

如果你只需要2個城市那麼簡單的東西可能是使用解析函數：

select distinct studentname 
    , min(city) over (partition by studentname) as city1 
    , min(street1) over (partition by studentname) as street1 
    , case when min(city) over (partition by studentname) 
        <> nvl(max(city) over (partition by studentname), 'x') 
       then max(city) over (partition by studentname) end as city2 
    , case when min(street) over (partition by studentname) 
        <> nvl(max(street) over (partition by studentname), 'x') 
       then max(street) over (partition by studentname) end as street2 
    from my_table 

雖然我要補充一點，你可能不應該這樣做。如果學生有3個地址會發生什麼？

Answer 2

我想你想這個方式是不正確的。

您應該返回「Ted」的2行，並使用您的視圖/報告代碼來處理輸出。如果您的需求發生變化，這樣會更容易，並且可以讓您更快地更改您的視圖/報告。