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BEGINFOR I IN 1..10000 LOOP INSERT INTO SSG_RNDCODE(IDX,CODE) VALUES(I,DBMS_RANDOM.STRING('X',12));END LOOP;END; DBMS_RANDOM.STRING('X',12) => 숫자 + 문자 12자리DBMS_RANDOM.STRING('U',12) => 숫자 12자리