How do I combine subquery rows into one column in Oracle? - sql

Question

I'm working with FileNet. I'm trying to get the folders that a document may be filed in to appear in one column of the record set delimited with semicolons. This was the layout previously decided on and I am tasked with making Oracle do it. Here's what I have for a query so far:
SELECT d1.F_DOCNUMBER,
d1.F_DOCCLASSNUMBER,
d1.F_ENTRYDATE,
d1.F_ARCHIVEDATE,
d1.F_RETENTBASE,
d1.F_RETENTDISP,
d1.F_RETENTOFFSET,
d1.F_PAGES,
d1.F_DOCTYPE,
d1.F_DOCFORMAT,
d1.A32 AS CERT_NUM,
d1.A35 AS DOC_TYPE,
d1.A36 AS BATCH_KEY,
d1.A37 AS FIELD_REP_CODE,
d1.A38 AS EFFECTIVE_DATE,
d1.A39 AS VOUCH_NUM_HIGH,
d1.A40 AS VOUCH_NUM_LOW,
f1.Folders
FROM doctaba d1
LEFT JOIN (SELECT SUBSTR (SYS_CONNECT_BY_PATH (F_FOLDERNAME , ';'), 2) Folders
FROM (SELECT fc2.F_DOCNUMBER, f2.F_FOLDERNAME, ROW_NUMBER () OVER (ORDER BY f2.F_FOLDERNAME) rn, COUNT (*) OVER () cnt
FROM folder_contents fc2
INNER JOIN folder f2
ON f2.F_FOLDERNUMBER = fc2.F_FOLDERNUMBER
WHERE fc2.F_DOCNUMBER = d1.F_DOCNUMBER)
WHERE rn = cnt
START WITH rn = 1
CONNECT BY rn = PRIOR rn + 1) f1
ON d1.F_DOCNUMBER = f1.F_DOCNUMBER
WHERE d1.F_DOCTYPE IS NULL
AND d1.F_DOCNUMBER >= 107777
AND d1.F_DOCNUMBER <= 305791
ORDER BY d1.F_DOCNUMBER;
The problem is that d1.F_DOCNUMBER is being marked as an invalid identifier. I read on some forums that Oracle may not let that column identifier work multiple query levels down. Anyone have some suggestions on how to make this work? Thanks!
EDIT:
Here's my original query that just includes the folder values in rows.
SELECT doctaba.F_DOCNUMBER,
doctaba.F_DOCCLASSNUMBER,
doctaba.F_ENTRYDATE,
doctaba.F_ARCHIVEDATE,
doctaba.F_RETENTBASE,
doctaba.F_RETENTDISP,
doctaba.F_RETENTOFFSET,
doctaba.F_PAGES,
doctaba.F_DOCTYPE,
doctaba.F_DOCFORMAT,
doctaba.A32 AS CERT_NUM,
doctaba.A35 AS DOC_TYPE,
doctaba.A36 AS BATCH_KEY,
doctaba.A37 AS FIELD_REP_CODE,
doctaba.A38 AS EFFECTIVE_DATE,
doctaba.A39 AS VOUCH_NUM_HIGH,
doctaba.A40 AS VOUCH_NUM_LOW,
folder.F_FOLDERNAME
FROM doctaba
LEFT JOIN folder_contents
ON doctaba.F_DOCNUMBER = folder_contents.F_DOCNUMBER
INNER JOIN folder
ON folder.F_FOLDERNUMBER = folder_contents.F_FOLDERNUMBER
WHERE doctaba.F_DOCTYPE IS NULL
AND doctaba.F_DOCNUMBER >= 107777
AND doctaba.F_DOCNUMBER <= 17208174
ORDER BY doctaba.F_DOCNUMBER;

Answer 1

In this case, you are lucky. You are only getting one value from the subquery, so you can just make it a correlated subquery in the select clause:
SELECT . . .
(SELECT SUBSTR(SYS_CONNECT_BY_PATH (F_FOLDERNAME , ';'), 2) as Folders
FROM (SELECT fc2.F_DOCNUMBER, f2.F_FOLDERNAME,
ROW_NUMBER () OVER (ORDER BY f2.F_FOLDERNAME) rn,
COUNT (*) OVER () cnt
FROM folder_contents fc2 INNER JOIN
folder f2
ON f2.F_FOLDERNUMBER = fc2.F_FOLDERNUMBER
WHERE fc2.F_DOCNUMBER = d1.F_DOCNUMBER
)
WHERE rn = cnt
START WITH rn = 1
CONNECT BY rn = PRIOR rn + 1
) as Folders
FROM doctaba d1
WHERE d1.F_DOCTYPE IS NULL AND
d1.F_DOCNUMBER >= 107777 AND
d1.F_DOCNUMBER <= 305791
ORDER BY d1.F_DOCNUMBER;