ORACLE创建id自增的表，及相关语句

新建下载权限记录表 DOWNLOADPOPE_TAB

字段：id、用户id、有下载权限的下载中心分类表id、有上传权限的下载中心分类表id

ID（int）、userid（int）、downid（string）、upid（string）

执行语句
//1创建
CREATE TABLE DOWNLOADPOPE_TAB
(
ID INT NOT NULL,
USERID INT NOT NULL,
DOWNID VARCHAR(60),
UPID VARCHAR(60),
CONSTRAINT DOWNLOADPOPE_TAB PRIMARY KEY (ID)
);
//2创建自动增长序列
CREATE SEQUENCE DOWNLOADPOPE_TAB_Sequence
INCREMENT BY 1
START WITH 1
NOMAXVALUE
NOCYCLE
CACHE 10;
//3创建触发器
CREATE TRIGGER DOWNLOADPOPE_TAB BEFORE
insert ON DOWNLOADPOPE_TAB FOR EACH ROW
begin
select DOWNLOADPOPE_TAB_Sequence.nextval into:New.id from dual;

end;
//4.提交
commit;
//5.插入
INSERT INTO DOWNLOADPOPE_TAB(userid,downid,upid)VALUES(100123,'oracle sql','54.70');
//6.查询
select * from jxpost.DOWNLOADPOPE_TAB
//7.删除数据
DELETE DOWNLOADPOPE_TAB where id=1
//8.删除表
DROP TABLE DOWNLOADPOPE_TAB