sql insert or update
-- Oracle: Example for Insert or update in t1 from t2 values
MERGE INTO table1 t1
USING table2 t2
ON (t1.CODE = t2.ID)
WHEN MATCHED THEN
UPDATE SET t1.COL1 = t2.VALUE1
WHEN NOT MATCHED THEN
INSERT (CODE, COL1) VALUES (t2.ID, t2.VALUE1);
-- MySql (makes a INSERT + DELETE if existing)
REPLACE INTO table1 (pk_id, col1) VALUES (5, 'aaaa');
--
INSERT INTO table1 VALUES (key, generation)
ON DUPLICATE KEY UPDATE (key = key, generation = generation + 1);