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CREATE TABLE table_name (SENDER, RECEIVER, TRANSACTION_ID) AS SELECT 1234, 5678, 1 FROM DUAL UNION ALL SELECT 1234, 5678, 4 FROM DUAL UNION ALL SELECT 5678, 1234, 5 FROM DUAL UNION ALL SELECT 5678, 1234, 9 FROM DUAL UNION ALL SELECT 5678, 9876, 12 FROM DUAL UNION ALL SELECT 9876, 5678, 7 FROM DUAL;
6 rows affected
SELECT LEAST(sender, receiver) AS sender, GREATEST(sender, receiver) AS receiver, COUNT(*) AS transaction_count FROM table_name GROUP BY LEAST(sender, receiver), GREATEST(sender, receiver)
SENDER
RECEIVER
TRANSACTION_COUNT
5678
9876
2
1234
5678
4