【Oracle】建立序列

PROMPT SEQ_RPS_ID 表序列DECLARE    AN_FLAG NUMBER;BEGIN    SELECT COUNT(1) INTO AN_FLAG FROM ALL_SEQUENCES          WHERE SEQUENCE_NAME='SEQ_RPS_ID';    If AN_FLAG = 0 Then        Execute IMMEDIATE 'CREATE SEQUENCE SEQ_RPS_ID        INCREMENT BY 1        START WITH 1        MAXVALUE 999999999999999999999999999        MINVALUE 1        CACHE 20';    END IF;END;/COMMIT;