Oracle SQL獨立查詢3而不是1行

Question

首先，我必須說，我在SQL查詢方面非常新，但在其他問題中我發現了很多幫助。但現在，我卡住了。

我下面的語句：

select distinct part_no, 
    case when cf$_package_type_db='RETAIL' then gtin_no end as retail, 
    case when cf$_package_type_db='INNER' then gtin_no end as "inner", 
    case when cf$_package_type_db='OUTER' then gtin_no end as outer 
from part_gtin_cfv 
where part_no='182400B000305' 

這給了我下面的結果：

我想吃點什麼是結果只有一行

Answer 1

如果每個Pat_no只有一個，請嘗試：

select part_no, 
    max(case when cf$_package_type_db='RETAIL' then gtin_no end) as retail, 
    max(case when cf$_package_type_db='INNER' then gtin_no end) as "inner", 
    max(case when cf$_package_type_db='OUTER' then gtin_no end) as outer 
from part_gtin_cfv 
where part_no='182400B000305' 
group by part_no