oracle id 自增

表名 table_name，主键 ID

CREATE SEQUENCE table_name_ID_SEQ
    MINVALUE 1 NOMAXVALUE INCREMENT BY 1 START WITH 1
NOCACHE;

CREATE OR REPLACE TRIGGER table_name_INS_TRG
  BEFORE INSERT ON table_name
  FOR EACH ROW
BEGIN
  SELECT table_name_ID_SEQ .NEXTVAL INTO :NEW.ID FROM DUAL;
END;