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CREATE TABLE allorders (Order_Nr, Items) AS SELECT 'O100', '5X1' FROM DUAL UNION ALL SELECT 'O100', '5X1' FROM DUAL UNION ALL SELECT 'O100', '7B3' FROM DUAL UNION ALL SELECT 'O101', '3A2' FROM DUAL UNION ALL SELECT 'O101', '3A2' FROM DUAL;
5 rows affected
SELECT order_nr, LISTAGG(counted_items, ' ') WITHIN GROUP (ORDER BY items) AS OrderOverview FROM ( SELECT order_nr, items, COUNT(*) || ' x ' || Items AS counted_items FROM allorders WHERE Order_Nr = 'O100' GROUP BY order_nr, items ) GROUP BY order_nr
ORDER_NR
ORDEROVERVIEW
O100
2 x 5X1 1 x 7B3