Table 输出 Sql

Question

我有如下查询输出。

Name   Price ProductTypeCode
Ram    120   P1
RAM    130   P1
RAM    140   P1
RAM    240   P1
RAM    340   P1
RAM    190   P2
RAM    160   P2

我想将上面的输出排列为：

Name   P2Price P1Price
Ram    190     120
RAM    160     130
RAM    null    140
RAM    null    240
RAM    null    340

请帮我实现上面的输出。

Answer 1

您可以使用row_number() 来枚举价格。然后旋转数据。以下查询使用条件聚合执行此操作：

select name,
       max(case when producttypecode = 'p2' then price end) as p2price,
       max(case when producttypecode = 'p1' then price end) as p1price
from (select t.*,
             row_number() over (partition by name, producttypecode order by name) as seqnum
      from table t
     ) t
group by name, seqnum;

Answer 2

无论 DB2 版本如何，以下查询都将 return 您的预期结果。

SELECT name,
       CASE WHEN producttypecode = 'p2' THEN price END AS p2price,
       CASE WHEN producttypecode = 'p1' THEN price END AS p1price  
       FROM YourTable

您也可以尝试（取决于 DB2 版本）：

SELECT NAME,
   DECODE(producttypecode , 'p2', price) AS p2pricel,
   DECODE(producttypecode , 'p1', price) AS p1price
FROM YourTable

Table 输出 Sql

Table Output in Sql

sql

db2

reporting-services