多行单列

Question

我怎么能检索的结果，如果给定的多行数据

Show multiple row data

上进行列结果的基础。条件以tserv_id'DISCHARGE'开始并以'ONPOWER'结束。

的条件：

1. 放电ONPOWER（1行）
2. 任何最后1）ONPOWER -------------- ONPOWER（1行之间进行的）
3. 任何之间执行的最后2）ONPOWER -------------- ONPOWER（1 row）
4. 任何执行之间的最后3）ONPOWER ------------ --- ONPOWEWR（1 row）

Output

代码：

select 
    min(Case tserv_id when 'Discharge' then PERFORMED end) as tserv_discharge, 
    min(Case tserv_id when 'ONPOWER' then PERFORMED end) as tserv_onpower --How to retrieve data performed between disharge & first onpower? 
from 
    ODS_REEFER 
where 
    EQ_NBR = 'A1234'; 

select 
    min(Case tserv_id when 'ONPOWER' then PERFORMED end) as tserv_onpower, 
    max(Case tserv_id when 'ONPOWER' then PERFORMED end) as tserv_onpower --How to exclude performed first ONPOWER and how to read performed between second ONPOWER? 
from 
    ODS_REEFER 
where 
    EQ_NBR = 'A1234'; 

Answer 1

使用聚合：

select min(Case tserv_id when 'Discharge' then PERFORMED end) as tserv_discharge, 
     min(Case tserv_id when 'ONPOWER' then PERFORMED end) as tserv_onpower, 
     min(Case tserv_id when 'YARD2TRUCK' then PERFORMED end) as tserv_yard2truck, 
     min(Case tserv_id when 'FULL OUT' then PERFORMED end) as tserv_fullout, 
     min(Case tserv_id when 'FULL IN' then PERFORMED end) as tserv_fullin 
from ODS_REEFER 
where EQ_NBR = 'EGSU5014174';