ORACLE序列的作用

ORACLE的序列用来辅助生成自增列用得。

CREATE OR REPLACE TRIGGER SET_APPLOG_ID

BEFORE INSERT ON APPLOG FOR EACH ROW

DECLARE

NEXT_APPLOG_ID NUMBER;

BEGIN

SELECT ID_APPLOG.NEXTVAL

INTO NEXT_APPLOG_ID

FROM DUAL

;

:NEW.APPLOGID:=NEXT_APPLOG_ID;

END;

CREATE SEQUENCE AUTEK.ID_APPLOG

START WITH 1

MAXVALUE 999999999999999999999999999

MINVALUE 1

NOCYCLE

NOCACHE

NOORDER;