oracle定义变量总结

1.声明若干个字段，并为其赋值（使用%type）

declare
 c_id number := 1;
 c_name customers.name%type;
 c_age customers.age%type;
 c_address customers.address%type;
 c_salary customers.salary%type;
begin
  select name,age,address,salary into c_name,c_age,c_address,c_salary from customers where id = c_id;
  dbms_output.put_line(c_id||c_name||c_age||c_address||c_salary);
end;

2.声明一个对象，并为其赋值(使用%rowtype)

declare
  c customers%rowtype;
begin
  select *  into c from customers where id = 1;
  dbms_output.put_line(c.id||c.name||c.age||c.address||c.salary);
end;

3.创建一个新对象，只拥有原对象的部分属性（使用type 对象名称  is  record）

declare
  type info is record(
       c_name customers.name%type,
       c_salary customers.salary%type
  );
  c info;
begin
  select name,salary into c from customers where id = 1;
  dbms_output.put_line(c.c_name||c.c_salary);
end;