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SQL> SELECT LAST_NUMBER FROM USER_SEQUENCES WHERE SEQUENCE_NAME = '시퀀스명'; NEXTVAL ------- 13 SQL> alter sequence 시퀀스명 increment by -13 minvalue 0; Sequence altered. SQL> select s.nextval from dual; NEXTVAL ---------- 0 SQL> alter sequence s increment by 1; Sequence altered. SQL> select s.nextval from dual; NEXTVAL ---------- 1

CREATE TABLE departments ( ID NUMBER(10) NOT NULL, DESCRIPTION VARCHAR2(50) NOT NULL); ALTER TABLE departments ADD ( CONSTRAINT dept_pk PRIMARY KEY (ID)); CREATE SEQUENCE dept_seq START WITH 1; 테이블 생성 후 PK를 지정해주고 시퀀스를 만들어 준다. CREATE OR REPLACE TRIGGER dept_bir BEFORE INSERT ON departments FOR EACH ROW BEGIN SELECT dept_seq.NEXTVAL INTO :new.id FROM dual; END; / 트리거도 만들어주면 끝! departments 테이블에 row..