Sélectionnez la sous-requête qui renvoie plusieurs lignes sous forme de chaîne (une colonne) dans la table (Oracle SQL)

SQL Fiddle

Configuration du schéma Oracle 11g R2 :

CREATE TABLE Product ( Product_No, Column1, Column2 ) AS
SELECT 1, 'A', 10 FROM DUAL UNION ALL
SELECT 2, 'B', 11 FROM DUAL UNION ALL
SELECT 3, 'C', 12 FROM DUAL
/
CREATE TABLE Inventory ( Product_No, Inventory_No, ColumnA, ColumnB, ColumnC ) AS
SELECT 1, 1, 'ABC',  20,  30 FROM DUAL UNION ALL
SELECT 1, 2, 'DDD',  30,  50 FROM DUAL UNION ALL
SELECT 2, 1, 'EFG',  60,  70 FROM DUAL UNION ALL
SELECT 2, 2, 'CDE',  99, 100 FROM DUAL UNION ALL
SELECT 3, 3, 'EFF', 120,  30 FROM DUAL
/

Requête 1 :

SELECT p.*, i.ColumnX
FROM   Product p
       LEFT OUTER JOIN
       ( SELECT Product_no,
                LISTAGG(
                  ColumnA || '-' || ColumnB || '-' || ColumnC,
                  ','
                ) WITHIN GROUP ( ORDER BY Inventory_no )
                AS ColumnX
         FROM   Inventory
         GROUP BY Product_No
       ) i
       ON ( p.product_no = i.product_no )

Résultats :

| PRODUCT_NO | COLUMN1 | COLUMN2 |              COLUMNX |
|------------|---------|---------|----------------------|
|          1 |       A |      10 |  ABC-20-30,DDD-30-50 |
|          2 |       B |      11 | EFG-60-70,CDE-99-100 |
|          3 |       C |      12 |           EFF-120-30 |