PL SQL查询一个变量并拆分为两列

Question

所以我有一个名为 Table1 的 table，有两列，Product 和 indicator。

Table1

Product    Indicator
Product 1     Y
Product 1     Y
Product 1     Y
Product 1     N
Product 1     N
Product 2     Y
Product 2     Y
Product 2     Y
Product 2     Y
Product 2     Y

我希望能够 运行 查询来显示这样的结果

            Indicator = Y   Indicator = N
Product 1        Y               Y
Product 2        Y               N

提前致谢！ :)

Answer 1

不需要 PL/SQL，这可以通过简单的 SQL，使用条件聚合来完成。

select product, 
       case 
         when count(case when indicator = 'Y' then 1 end) > 0 then 'Y'
         else 'N'
       end as "Indicator = Y",
       case 
         when count(case when indicator = 'N' then 1 end) > 0 then 'Y'
         else 'N'
       end as "Indicator = N"
from table1
group by product
order by product;