[英]SAP HANA: Not able to generate the required output with COUNT and CASE function IN SQL
這是一個場景,單個用戶分配給多個分支(1 到許多)
我想根據分配給該用戶的辦公室對用戶進行分組。 根據分配的辦公室,我想在 select 語句中創建 2 列:
分配給該用戶的辦公室數量
分配給該用戶的辦公室名稱
這是我用 SQL 得到的 output(見下文):
USER_LABEL NUMBER_OFFICE_ASSIGNED BRANCH_ASSIGNED
-------------------------------------------------------------
FARAG 1 HQ
FARAG 1 SCM
FARAG 1 TCD
FARAG 1 TCM
這是我需要的 output:
USER_LABEL NUMBER_OFFICE_ASSIGNED BRANCH_ASSIGNED
-------------------------------------------------------------
FARAG 4 HQ,SCM,TCD,TCM
怎么做?
SQL代碼如下:
SELECT us.USER_LABEL ,
count(od.office_id) AS "NUMBER_OFFICE_ASSIGNED",
CASE
WHEN od.OFFICE_ID=4 THEN 'HQ'
WHEN od.OFFICE_ID=5 THEN 'TCM'
WHEN od.OFFICE_ID=6 THEN 'TCD'
WHEN od.OFFICE_ID=7 THEN 'SCM'
WHEN od.OFFICE_ID=8 THEN 'SSAAC'
ELSE 'No branch assigned. Check with Admin'
END AS "BRANCH_ASSIGNED"
FROM VIEW_USER_SETUP us
INNER JOIN USERS_DEPARTMENTS ud
on(us.USER_ID=ud.USER_ID)
INNER JOIN DEPARTMENT_SETUP ds
on(ud.DEPARTMENT_ID=ds.DEPARTMENT_ID)
INNER JOIN DEPARTMENT_OFFICE do
on(ds.DEPARTMENT_ID=do.DEPARTMENT_ID)
INNER JOIN OFFICE_DETAILS od
on(do.OFFICE_ID=od.OFFICE_ID)
WHERE
ds.ACTIVE_STATUS ='Y'
AND
do.ACTIVE_STATUS='Y'
AND
od.ACTIVE_STATUS='Y'
AND
us.ACTIVE_STATUS ='Y'
AND
us.USER_TYPE ='D'
AND
us.USER_LABEL NOT IN('Emergency Room','General Doctor','General Doctor Oph')
GROUP BY
us.USER_LABEL,
od.OFFICE_ID
ORDER BY
us.USER_LABEL ASC;
首先,您應該從GROUP BY
子句中刪除od.OFFICE_ID
,因為最終您不想按OFFICE_ID
進行分組。 此更改要求您對CASE
投影應用聚合,因為它使用OFFICE_ID
。 基於您所需的 output 的正確聚合方法是 function STRING_AGG 。
結果語句看起來像
SELECT
us.USER_LABEL ,
count(od.office_id) AS "NUMBER_OFFICE_ASSIGNED",
STRING_AGG(CASE .... END, ',') AS "BRANCH_ASSIGNED"
FROM ...
WHERE ...
GROUP BY
us.USER_LABEL
ORDER BY
us.USER_LABEL ASC;
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