Joining multiple rows into a single row without aggregation using Oracle11g - sql

Question

The below link shows the same question that was asked which I want to ask and the code which was provided to answer the query, I used this query (modified it) but please how do I add a join table and a where clause in this query? see below the code I have added to the code in the link below but I am getting error messages. I would like the output to be same as the one provided in the link below
Joining multiple rows into a single row without aggregation [Oracle]
Bare in mind that the desired result provided in the link is my same desired results.
Below is the script which I have modified:
select max(case when seqnum = 1 then p.PERSONID end) as PersonID,
max(case when seqnum = 1 then t.PHONEID end) as PhoneID1,
max(case when seqnum = 1 then t.PHONENUM end) as PhoneNum1,
max(case when seqnum = 1 then t.TYPE end) as Type1,
max(case when seqnum = 1 then t.ISPRIMARY end) as IsPrimary1,
max(case when seqnum = 1 then t.ROWSTAMP1 end) as Rowstamp1,
max(case when seqnum = 2 then t.PHONEID end) as PhoneID2,
max(case when seqnum = 2 then t.PHONENUM end) as PhoneNum2,
max(case when seqnum = 2 then t.TYPE end) as Type2,
max(case when seqnum = 2 then t.ISPRIMARY end) as IsPrimary2,
max(case when seqnum = 2 then t.ROWSTAMP1 end) as Rowstamp2,
max(case when seqnum = 3 then t.PHONEID end) as PhoneID3,
max(case when seqnum = 3 then t.PHONENUM end) as PhoneNum3,
max(case when seqnum = 3 then t.TYPE end) as Type3,
max(case when seqnum = 3 then t.ISPRIMARY end) as IsPrimary3,
max(case when seqnum = 3 then t.ROWSTAMP1 end) as Rowstamp3
from (test1.phone t left join test2.person p
ON t1.PERSONID = t2.PERSONID
where t2.PERSONID = 'MXSDFD'
) t;
rownum as seqnum
from t

Answer 1

Use PIVOT:
select personid,
"1_PHONEID" AS phoneid1,
"1_PHONENUM" AS phonenum1,
"1_TYPE" AS type1,
"1_ISPRIMARY" AS isprimary1,
"1_ROWSTAMP1" AS rowstamp1,
"2_PHONEID" AS phoneid2,
"2_PHONENUM" AS phonenum2,
"2_TYPE" AS type2,
"2_ISPRIMARY" AS isprimary2,
"2_ROWSTAMP1" AS rowstamp2,
"3_PHONEID" AS phoneid3,
"3_PHONENUM" AS phonenum3,
"3_TYPE" AS type3,
"3_ISPRIMARY" AS isprimary3,
"3_ROWSTAMP1" AS rowstamp3
from (
SELECT p.personid,
t.phoneid,
t.phonenum,
t.type,
t.isprimary,
t.rowstamp1,
ROW_NUMBER() OVER (
PARTITION BY p.personid ORDER BY t.isprimary DESC, t.rowstamp1 DESC
) AS seqnum
FROM person p
left join phone t
ON ( t.PERSONID = p.PERSONID )
where t.PERSONID = 'MXSDFD'
)
PIVOT (
MAX( phoneid ) AS phoneid,
MAX( phonenum ) AS phonenum,
MAX( type ) AS type,
MAX( isprimary ) AS isprimary,
MAX( rowstamp1 ) AS rowstamp1
FOR seqnum IN ( 1, 2, 3 )
)
Which, for the sample data:
CREATE TABLE person ( personid, name ) AS
SELECT 'MXSDFD', 'Alice' FROM DUAL;
CREATE TABLE phone ( personid, phonenum, phoneid, type, isprimary, rowstamp1 ) AS
SELECT 'MXSDFD', '012346', 1, 'A', 'N', TIMESTAMP '2020-10-13 09:00:00' FROM DUAL UNION ALL
SELECT 'MXSDFD', '555666', 3, 'C', 'N', TIMESTAMP '2020-10-13 08:30:00' FROM DUAL UNION ALL
SELECT 'MXSDFD', '987654', 2, 'B', 'Y', TIMESTAMP '2020-10-13 08:00:00' FROM DUAL;
Outputs:
PERSONID | PHONEID1 | PHONENUM1 | TYPE1 | ISPRIMARY1 | ROWSTAMP1 | PHONEID2 | PHONENUM2 | TYPE2 | ISPRIMARY2 | ROWSTAMP2 | PHONEID3 | PHONENUM3 | TYPE3 | ISPRIMARY3 | ROWSTAMP3
:------- | -------: | :-------- | :---- | :--------- | :--------------------------- | -------: | :-------- | :---- | :--------- | :--------------------------- | -------: | :-------- | :---- | :--------- | :---------------------------
MXSDFD | 2 | 987654 | B | Y | 13-OCT-20 08.00.00.000000000 | 1 | 012346 | A | N | 13-OCT-20 09.00.00.000000000 | 3 | 555666 | C | N | 13-OCT-20 08.30.00.000000000
db<>fiddle here

Answer 2

You seem to want logic like this:
select max(case when seqnum = 1 then t.PERSONID end) as PersonID,
max(case when seqnum = 1 then t.PHONEID end) as PhoneID1,
max(case when seqnum = 1 then t.PHONENUM end) as PhoneNum1,
max(case when seqnum = 1 then t.TYPE end) as Type1,
max(case when seqnum = 1 then t.ISPRIMARY end) as IsPrimary1,
max(case when seqnum = 1 then t.ROWSTAMP1 end) as Rowstamp1,
max(case when seqnum = 2 then t.PHONEID end) as PhoneID2,
max(case when seqnum = 2 then t.PHONENUM end) as PhoneNum2,
max(case when seqnum = 2 then t.TYPE end) as Type2,
max(case when seqnum = 2 then t.ISPRIMARY end) as IsPrimary2,
max(case when seqnum = 2 then t.ROWSTAMP1 end) as Rowstamp2,
max(case when seqnum = 3 then t.PHONEID end) as PhoneID3,
max(case when seqnum = 3 then t.PHONENUM end) as PhoneNum3,
max(case when seqnum = 3 then t.TYPE end) as Type3,
max(case when seqnum = 3 then t.ISPRIMARY end) as IsPrimary3,
max(case when seqnum = 3 then t.ROWSTAMP1 end) as Rowstamp3
from (select t.*, rownum as seqnum
from test1.phone t join
test2.person p
on t.PERSONID = p.PERSONID
where p.PERSONID = 'MXSDFD'
) t;
That said, you don't seem to need the join at all, because you are filtering on the join key (it is in both tables). So:
from (select t.*, rownum as seqnum
from test1.phone t
where t.PERSONID = 'MXSDFD'
) t