插入到具有子类型列的表中:类型继承、面向对象的 SQL

Question

当我尝试将数据插入下表时。

create table Policies of policy_t(
pid primary key,
inscar references Cars
)nested table claims store as  claims_ntable;

使用以下查询，

insert into policies
select policy_t ('PLC1234','12 Mar 2017','12 Mar 2018',REF(C),175000,claim_t('CLAIM1234567','12 Feb 2017','56000',REF(T)))
from cars C,customer T
where C.regno = 'CAB3233' and T.cid = '123ABC'

我收到以下错误

Error starting at line : 1 in command -
insert into policies
select policy_t ('PLC1234','12 Mar 2017','12 Mar    2018',REF(C),175000,claim_t('CLAIM1234567','12 Feb 2017','56000',REF(T)))
from cars C,customer T
where C.regno = 'CAB3233' and T.cid = '123ABC'
Error at Command Line : 3 Column : 25
Error report -
SQL Error: ORA-00942: table or view does not exist
00942. 00000 -  "table or view does not exist"
*Cause:    
*Action:

如何将数据插入此表？

其他相关的对象类型和表，

客户对象类型

create type Customer_t as object(
cid char(6),
cusname varchar(15),
birthdate date,
phone char(10),
address varchar(50)
);

客户表

create table Customers of customer_t(
cid primary key
);

声明对象类型

create type claim_t as object(
claimno char(12),
cdate date,
amount number(8,2),
claimant ref customer_t
);

声明嵌套表

create type Claim_ntab is table of claim_t;

汽车对象类型

create type Car_t as object(
regno char(9),
make varchar(12),
model varchar(10),
mdate date,
owner ref customer_t,
value number(8,2)
);

汽车表

create table Cars of car_t(
regno primary key,
owner references Customers
);

策略对象类型

create type policy_t as object(
pid char(7),      
sdate date,
edate date,
inscar ref car_t,
premium number(6,2),
claims claim_ntab
)

策略表

create table Policies of policy_t(
pid primary key,
inscar references Cars
)nested table claims store as  claims_ntable;

Answer 1

更正表名(customer/customers(后，下一个问题是customers.claims是一个claim_ntab，但您正在尝试在其中插入claim_t。试试这个：

insert into policies
select policy_t
( 'PLC1234'
, date '2017-03-12'
, date '2018-03-12'
, ref(ca)
, 175000
, claim_ntab(claim_t
( 'CLAIM1234567'
, date '2017-02-12'
, '56000'
, ref(cu) ) )
)
from   cars ca
join customers cu
on ref(cu) = ca.owner
where  ca.regno = 'CAB3233'
and    cu.cid = '123ABC'

编辑：我使用对象引用将您的where子句连接更改为 ANSI 样式。老实说，我以前没有使用过这种语法，我怀疑很少有人使用过，所以它需要一些测试。

Answer 2

您将表命名为Customers，请注意复数形式。

所以改变

from cars C,customer T

自

from cars C,customers T

或者更好的是，当你无论如何都在使用它时，使用显式JOIN语法重写它。

Answer 3

INSERT INTO _table1_ (_field1_, _field2_, _field3_)字段名称，而不是值SELECT _field1_, _field2_, _field3_ FROM _table2_ WHERE ... ;

INSERT INTO _table1_ (_field1_, _field2_, _field3_) VALUES ('some text', 'some text', 'some text');是否要添加一些值