336x280(권장), 300x250(권장), 250x250, 200x200 크기의 광고 코드만 넣을 수 있습니다.
- NEXTVAL : The NEXTVAL pseudocolumns is used to extract successive sequence numbers from a specified sequence.
sequence.NEXTVAL
- CURRVAL : The CURRVAL pseudocolumn is used to refer to a sequence number that the current user has just generated.
After you generated a sequence object, you have to call NEXTVAL first because the initiatied pointer of the sequence object is pointing the head of the object which has NULL.
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