[英]ListAgg in Oracle sql (based on 2 tables)
我的解釋如下。
BRDB.EXPORT SHIPMENT (table)
SHPMNT_REF | SHIPMENT_TYPE
867 | EHH
868 | EHH
869 | EHH
BRDB.EVENT_CODE (table)
FILE_NO | REMARKS EVENT_CODE
867 | TEST0 SIR
867 | TEST1 SIR
867 | TEST2 SIR
867 | TEST3 SIR
868 | TEST4 EEO
I want my report is showing as below
FILE NO | REMARKS
123 | TEST0,TEST1,TEST2
456 | TEST3
運行這些代碼“從僅允許一列的子查詢返回多列”時收到錯誤。
select min(X.SHPMNT_REF) as "House B/L #",
listagg(case when SIR = 1 then X.REMARKS end, ',') within group (order by X.SHPMNT_REF) as "REMARKS(from SIR Event)"
FROM (select ES.SHPMNT_REF,
(select EE.REMARKS,
row_number() over (order by EE.FILE_NO)
FROM BRDB.EXPORT_EVENT EE
where EE.FILE_NO = ES.SHPMNT_REF
and EE.EVENT_CODE = 'SIR') as SIR
from BRDB.EXPORT_SHIPMENT ES)X
GROUP BY X.SHPMNT_REF
假設您輸入的示例輸入有誤,此簡單查詢應該對您有用
SELECT file_no,
LISTAGG(remarks, ',') WITHIN GROUP (ORDER BY remarks) AS remarks
FROM brdb.event_code
WHERE event_code = 'SIR'
GROUP BY file_no
ORDER BY file_no;
您的問題有以下問題,首先是第一部分EXPORT_SHIPMENT中的表名(我假設其中有下划線),而EVENT_CODE與您提供的代碼段不匹配。 您是否還在嘗試將行號合並到“文件號”字段中? 很難確定您要尋找什么。
對於原始錯誤,Oracle相關子查詢不支持多列。 這是導致該錯誤的原因,您可以返回ee.remarks
或row_number()
,而不是兩者都返回。
select EE.REMARKS,
row_number() over (order by EE.FILE_NO)
from BRDB.EXPORT_EVENT EE
where EE.FILE_NO = ES.SHPMNT_REF
and EE.EVENT_CODE = 'SIR'
對於您想要的東西,我最大的猜想是這樣的,請注意,我正在加入表,而不嘗試子查詢。
select X.FILE_NO
,listagg(X.REMARKS || ',') within group (order by X.SHPMNT_REF)
,listagg(X.ROW_NUM) within group (order by X.SHPMNT_REF)
FROM
(
select EE.FILE_NO,
ES.SHPMNT_REF,
EE.REMARKS,
row_number() over (order by EE.FILE_NO) as ROW_NUM
FROM EVENT_CODE EE
JOIN EXPORT_SHIPMENT ES
ON EE.FILE_NO = ES.SHPMNT_REF
AND EE.EVENT_CODE = 'SIR'
) X
group by X.FILE_NO
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