Question

我正在尝试清理它，只有一个实例而不是10个。

该特定条目与CASE语句（列出的12个中的10个）中的每个单独的数据段相关。

查看是否有人有任何想法（除了一遍又一遍地加入CTE，即

LEFT JOIN sessions_CTE scte1 on scte1.person_id = p.person_id and 
scte1.session_id = '229856'
LEFT JOIN sessions_CTE scte2 on scte2.person_id = p.person_id and scte2.session_id = '229846'
LEFT JOIN sessions_CTE scte3 on scte3.person_id = p.person_id and scte3.session_id = '229798'...

那很好，在DB上它是巨大且粗略的）

这是我的查询，谢谢你们提出的任何想法：

WITH sessions_CTE AS
(
        select
            a.person_id,
            s.session_id,
            s.abbreviation,
            s.title,
            st.sessionTime_id,
            d.abbreviation as day,
            sl.minutes length,
            r.name room
          from
            attendeesregistered a
            inner join sessiontimes st on a.sessiontime_id = 
st.sessiontime_id
            inner join sessions s on st.session_id = s.session_id
            inner join slots on st.slot_id = slots.slot_id
            inner join days d on slots.day_id = d.day_id
            inner join rooms r on slots.room_id = r.room_id
            inner join slottimes on slots.slottime = 
slottimes.slottime_id
            inner join ses_length sl on slottimes.length = 
sl.ses_length_id
WHERE a.event = '23533'
--and ROWNUM <= 10
)

SELECT  DISTINCT p.person_id,
    p.email "Email",
    p.firstname "First Name",
    p.lastname "Last Name",
    p.jobTitle "Job Title",
    p.companyname "Company Name",
    CASE
        WHEN scte.session_id = '229744' THEN 'Registered'
       -- ELSE ''
    END as ExecutiveChannelPartnerMeeting,
    CASE
        WHEN scte.session_id = '229753' THEN 'Registered'
        ELSE ''
    END as ChickenParm,
    CASE
        WHEN scte.session_id = '229761' THEN 'Registered'
        ELSE ''
    END as Pesto,
    CASE
        WHEN scte.session_id = '229764' THEN 'Registered'
        ELSE ''
    END as mcyds,
    CASE
        WHEN scte.session_id = '229770' THEN 'Registered'
        ELSE ''
    END as bigmac,
    CASE
        WHEN scte.session_id = '229840' THEN 'Registered'
        ELSE ''
    END as mtndew,
    CASE
        WHEN scte.session_id = '229841' THEN 'Registered'
        ELSE ''
    END as sprite,
    CASE
        WHEN scte.session_id = '229852' THEN 'Registered'
        ELSE ''
    END as corndogs,
    CASE
        WHEN scte.session_id = '229853' THEN 'Registered'
        ELSE ''
    END as burritto,
    CASE
        WHEN scte.session_id = '229856' THEN 'Registered'
        ELSE ''
    END as mickeymouse,
    CASE
        WHEN scte.session_id = '229842' THEN 'Registered'
        ELSE ''
    END as mario,
    CASE
        WHEN scte.session_id = '229847' THEN 'Registered'
        ELSE ''
    END as link
    --scte.session_id,
    --scte.title
FROM people p
RIGHT JOIN sessions_CTE scte on scte.person_id = p.person_id
WHERE p.event = '23533'
AND p.person_id = 2388207
--AND ROWNUM <= 25
--GROUP BY p.person_id

当前输出：

ID         |  Exec.   |Chicken Parm |  Pesto    | ......
----------- ---------- ------------- ----------- ------------
2388207    | Registered| (NULL)     | (NULL)    | ........
----------- ----------- ------------ ----------- ------------
2388207    | (NULL)    |  (NULL)    | Reistered | ........
----------- ----------- ------------ ----------- ------------
2388207    | (NULL)    |  Registered|  (NULL)   | ........
----------- ----------- ------------ ----------- ------------

所需的输出

ID         |  Exec.    |Chicken Parm |  Pesto    | ......
--------------------------------------------------------------
2388207    |Registered | Registered  | Registered| ........
----------- ----------- ------------ ----------- ------------

Answer 1

您可以分组，然后在情况下使用MAX

WITH sessions_CTE AS
(
...
)
SELECT
p.person_id,
p.email AS "Email",
p.firstname AS "First Name",
p.lastname AS "Last Name",
p.jobTitle AS "Job Title",
p.companyname AS "Company Name",
MAX(CASE WHEN session_id = '229744' THEN 'Registered' END) AS "ExecutiveChannelPartnerMeeting",
MAX(CASE WHEN session_id = '229753' THEN 'Registered' END) AS "ChickenParm",
MAX(CASE WHEN session_id = '229761' THEN 'Registered' END) AS "Pesto",
MAX(CASE WHEN session_id = '229764' THEN 'Registered' END) AS "mcyds",
MAX(CASE WHEN session_id = '229770' THEN 'Registered' END) AS "bigmac",
MAX(CASE WHEN session_id = '229840' THEN 'Registered' END) AS "mtndew",
MAX(CASE WHEN session_id = '229841' THEN 'Registered' END) AS "sprite",
MAX(CASE WHEN session_id = '229852' THEN 'Registered' END) AS "corndogs",
MAX(CASE WHEN session_id = '229853' THEN 'Registered' END) AS "burritto",
MAX(CASE WHEN session_id = '229856' THEN 'Registered' END) AS "mickeymouse",
MAX(CASE WHEN session_id = '229842' THEN 'Registered' END) AS "mario",
MAX(CASE WHEN session_id = '229847' THEN 'Registered' END) AS "link"
FROM people p
RIGHT JOIN sessions_CTE scte on scte.person_id = p.person_id
WHERE p.event = '23533'
  AND p.person_id = 2388207
GROUP BY p.person_id, p.email, p.firstname, p.lastname, p.jobTitle, p.companyname;

将结果合二为一

1 个答案: