记录类型是表中当行数据结构的一个镜像。每个记录只存储一行数据，记录包含的是字段，而不是列。
1.用%rowtype属性隐式定义记录类型
declare
individual individuals%rowtype --记录变量individual与individuals表的结构构成镜像，拥有表的所有字段
begin
individual.individual_id:=1; --对变量的各个字段初始化
individual_id.first_name:=‘Jone‘;
individual_id.last_name:=‘Steve‘;insert
into individuals --将字段插入到individuals表中
vaules
(individual.individual_id,
individual_id.first_name,
individual_id.last_name);commit;
end;
/
2.显式的将记录定义为PL/SQL记录类型
declare
type individual_record is record --显shi的定义记录类型 individual_record
(individual_id integer,
first_name varchar(30 char),
last_name varchar(30 char)
);
begin
individual individual_record; --定义 individual_record的一个变量 individual
individual.individual_id:=1; --对变量的各个字段初始化
individual_id.first_name:=‘Jone‘;
individual_id.last_name:=‘Steve‘;insert into
individuals --将字段插入到individuals表中
vaules
(individual.individual_id,
individual_id.first_name,
individual_id.last_name);
commit
end;
/
3.显式的将记录类型定义为对象类型
--create a database object type
create or replace type individual_record as object --对象类型头
(
individual_id interger,
first_name varchar(30 char),
last_name varchar(30 char),constructor function individual_record
(
individual_id interger,
first_name varchar,
last_name varchar
)
return self as result
)
instantiable not final;
/--crate a database object body --对象主体
create or replace type body individual_record as
constructor function individual_record
(
individual_id interger,
first_name varchar,
last_name varchar
)
return self as result is --构造函数实现
begin
self.individual_id:=individual_id;
self.first_name:=first_name;
selg.last_name:=last_name;
return;
end;
end;
/declare
individual individual_record; --用对象类型定义individual记录变量
begin
individual:=
individual(1,‘Jone‘,‘Steve‘); --调用构造函数初始化记录变量insert into
individuals --将字段插入到individuals表中
vaules
(individual.individual_id,
individual_id.first_name,
individual_id.last_name);commit;
end;
/
PL/SQL 记录 Record 简介