使用DDL语句创建主键自增的Oracle数据库表结构：

CREATE TABLE "SCOTT"."ADMINS" (

"ID" NUMBER(10) NOT NULL ,

"MERID" VARCHAR2(200 CHAR) NULL ,

"SUBID" VARCHAR2(200 CHAR) NULL ,

"SUBNAME" VARCHAR2(200 CHAR) NULL ,

"STATUS" VARCHAR2(200 CHAR) NULL ,

"REMARK" VARCHAR2(200 CHAR) NULL 

)

LOGGING

NOCOMPRESS

NOCACHE

;

--创建自增ID，名称为：表名_字段名_SEQ

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

-- 为Insert操作创建触发器，无需在SQL语句里写NEXTVAL，名称为表名_INS_TRG

CREATE OR REPLACE TRIGGER ADMINS_INS_TRG BEFORE INSERT ON ADMINS FOR EACH ROW WHEN(NEW.ID IS NULL)

BEGIN

SELECT ADMINS_ID_SEQ.NEXTVAL INTO :NEW.ID FROM DUAL;

END;