Grouping multiple data in oracle sql - sql

Question

i have this table in my oracle db
enter image description here
is there some way I can perform the grouping in SQL? so that the returned data is something like
enter image description here
Thank you

Answer 1

In later versions of Oracle you can use:
SELECT product_id,
LISTAGG(DISTINCT qc, ',') WITHIN GROUP (ORDER BY qc) AS qc,
LISTAGG(DISTINCT packing, ',') WITHIN GROUP (ORDER BY packing)
AS packing,
LISTAGG(DISTINCT delivering, ',') WITHIN GROUP (ORDER BY delivering)
AS delivering
FROM table_name
GROUP BY product_id
However, in Oracle 11, LISTAGG does not support the DISTINCT keyword and you would either need to pre-process the input to remove duplicates or to post-process the aggregated string:
SELECT product_id,
REPLACE(
TRIM(
BOTH ',' FROM
REGEXP_REPLACE(
',' || LISTAGG(qc, ',,') WITHIN GROUP (ORDER BY qc) || ',',
'(,.*?,)\1+',
'\1'
)
),
',,',
','
)AS qc,
REPLACE(
TRIM(
BOTH ',' FROM
REGEXP_REPLACE(
',' || LISTAGG(packing, ',,') WITHIN GROUP (ORDER BY packing) || ',',
'(,.*?,)\1+',
'\1'
)
),
',,',
','
)AS packing,
REPLACE(
TRIM(
BOTH ',' FROM
REGEXP_REPLACE(
',' || LISTAGG(delivering, ',,') WITHIN GROUP (ORDER BY delivering) || ',',
'(,.*?,)\1+',
'\1'
)
),
',,',
','
)AS delivering
FROM table_name
GROUP BY product_id
Which, for the sample data:
CREATE TABLE table_name ( product_id, qc, packing, delivering ) AS
SELECT 1, 'A', 'A', 'C' FROM DUAL UNION ALL
SELECT 1, 'A', 'B', 'C' FROM DUAL UNION ALL
SELECT 2, 'A', 'C', 'C' FROM DUAL UNION ALL
SELECT 3, 'A', 'B', 'D' FROM DUAL UNION ALL
SELECT 3, 'A', 'D', 'D' FROM DUAL;
Both output (for compliant versions):
PRODUCT_ID
QC
PACKING
DELIVERING
1
A
A,B
C
2
A
C
C
3
A
B,D
D
fiddle