oracle 自增長序列

oracle 自增長序列

create or replace TRIGGER "METTINGUSER".TRG_PREPN BEFORE INSERT ON "PREPROJFUN"  FOR EACH ROW BEGIN SELECT SEQ_PRN.NEXTVAL INTO :NEW.PRN_ID FROM DUAL; END;   CREATE SEQUENCE SEQ_PRN_1   INCREMENT BY 1 START WITH 1 NOMAXVALUE NOCYCLE NOCACHE