oracle创建表、序列、触发器

脚本如下

-- 1. 创建表
-- Create table
create table base
(
id number,
descr varchar2(200),
create_date date,
lst_upd_date date
)
;
-- Create/Recreate primary, unique and foreign key constraints
alter table base
add constraint pk_base primary key (ID);

/

-- 2. 创建序列
-- Create sequence
create sequence seq_base
minvalue 1
maxvalue 999999999999999999999999999999
start with 1
increment by 1
cache 3
order;

/

-- 3. 创建触发器
create or replace trigger trigger_base
before insert or update on base
for each row
declare
c date := sysdate;
begin
if INSERTING then
:new.create_date := c;
:new.lst_upd_date := c;
elsif UPDATING then
:new.lst_upd_date := c;
end if;
end trigger_base;

/

-- 4. insert update 验证序列和触发器
insert into base(id, descr) values(seq_base.nextval, 'v1');
update base set descr = 'v2';
commit;