sql - Oracle consolidate 2 rows into column

Question

Need help to display 2 rows as consolidated column
Made this image to illustrate the problem Thank you for your help

Answer 1

如果您只需要 2 个城市，那么使用分析函数可能很简单：

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

尽管我必须补充一点，您可能不应该这样做。如果学生有 3 个地址会怎样？

Answer 2

我认为您对此的思考方式不正确。

您应该为“Ted”返回 2 行并使用您的视图/报告代码操作输出。这会容易得多，并且如果您的要求发生变化，您可以非常快速地更改视图/报告。