Question

我正在尝试将透视列的别名命名为方案1，方案2，方案3，而不是1,2,3。我遇到了错误。

select *
from (select *
      from (select s.campaign_id campaign_id, s.scenario_index scenario_index 
            from scenario s, campaign c where s.campaign_id = c.campaign_id)
      pivot (max(scenario_index)for scenario_index in (1,2,3))
     )a

谢谢，聚合现在为结果提供别名。我的要求是将这些列与另一个查询

组合

select  CASE WHEN AWARD_TYPE = 0 THEN award_rate||' points'
                                        when AWARD_TYPE = 1   then Award_rate||' %'
                                        when award_type=2  then RATIO_POINTS||' points per '||RATIO_MON_UNIT||' AED' End
                            from  points_rule p
                            where c.pt_basic_rule_id = p.point_rule_id ) as pool_awards,

此查询作为一列出现，然后场景1、2,3应作为3列出现，其中基于campaign_id的pool_award值

Answer 1

只需使用条件聚合：

select s.campaign_id,
       max(case when scenario_index = 1 then 1 end) as scenario1,
       max(case when scenario_index = 2 then 1 end) as scenario2,
       max(case when scenario_index = 3 then 1 end) as scenario3
from scenario s join
     campaign c 
     on s.campaign_id = c.campaign_id
group by campaign_id;

Answer 2

您可以在IN的{{1}}子句中使用别名，如下所示：

PIVOT

别名枢轴列

2 个答案: