--建表t_account
create table t_account(
accountid number(8) not null,
accountname varchar(100) not null
)tablespace portalone;
alter table t_account add constraint pk_account primary key(accountid) using index tablespace portaloneindx;
--建序列
create sequence s_account
minvalue 1
maxvalue 99999999
start with 1
increment by 1
cache 20;
--建觸發器
create or replace trigger trigger_t_account
before insert on t_account
for each row when(new.accountid is null)
declare
begin
--從序列中獲取新的序號並賦給新行的id欄位
select s_account.nextval into :new.accountid from dual;
--獲取系統的guid/uuid生成主鍵
--select sys.guid() into :new.accountid from dual;
--獲取系統時間作為表的某個字段值
--select to_char(sysdate, "yyyy-mm")into :new.year_month from dual;
end trigger_t_account;
--建表t_order
drop table t_order;
create table t_order(
orderid number(8) not null,
accountid number(8) not null,
ordername varchar(100) not null
)tablespace portalone;
alter table t_order add constraint pk_order primary key(orderid) using index tablespace portaloneindx;
alter table t_order add constraint fk_order foreign key(accountid) references t_account(accountid);
--建立序列
create sequence s_order
minvalue 1
maxvalue 99999999
start with 1
increment by 1
cache 20;
--建觸發器
create or replace trigger trigger_t_order
before insert on t_order
for each row when (new.orderid is null)
declare
begin
select s_order.nextval into :new.orderid from dual;
select s_order.currval into :new.accountid from dual;
end trigger_t_order;
--建表t_orderitem
drop table t_orderitem;
create table t_orderitem(
orderitemid number(8) not null,
orderid number(8) not null,
orderitemname varchar(100) not null
)tablespace portalone;
alter table t_orderitem add constraint pk_orderitem primary key(orderitemid) using index tablespace portaloneindx;
alter table t_orderitem add constraint fk_orderitem foreign key(orderid) references t_order(orderid);
--建序列
create sequence s_orderitem
minvalue 1
maxvalue 99999999
start with 1
increment by 1
cache 20;
--建觸發器
create or replace trigger trigger_t_orderitem
before insert on t_orderitem
for each row when (new.orderitemid is null)
declare
begin
select s_orderitem.nextval into :new.orderitemid from dual;
select s_orderitem.currval into :new.orderid from dual;
end trigger_t_orderitem;
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