Database 将记录插入数据库Oracle SQLPLUS时出错

我是新手，所以这可能很傻，但是

我创建了3个表：

  create table faculty (id_faculty number(2) Primary Key, //id , 2 digits, primary key
  faculty_name varchar2(30) constraint f_name Not Null, // name, up to 30 symbols, not null
  dean varchar2(20), // dean, up to 20 symbols
  telephone varchar2(8)); //number, up to 8 symbols

create or replace view stud_stip AS
 Select f.faculty_name, student_surname, student_name, s.course_year,
 m.stipend, m.payout_date
 from
 faculty f inner join student s on f.id_faculty=s.faculty_id
 inner join money m on m.student_id=s.id_student
 where
 m.payout_date = ( select distinct max(payout_date)
 from money
 where money.student_id=money.student_id)
 with check option;

insert into stud_stip values ('Partikas tehnologiju', 'Lapa', 'Jana', 2, 120, '03.12.1998');

ORA-01779: cannot modify a column which maps to a non key-preserved table

然后我想向视图添加信息：

  create table faculty (id_faculty number(2) Primary Key, //id , 2 digits, primary key
  faculty_name varchar2(30) constraint f_name Not Null, // name, up to 30 symbols, not null
  dean varchar2(20), // dean, up to 20 symbols
  telephone varchar2(8)); //number, up to 8 symbols

create or replace view stud_stip AS
 Select f.faculty_name, student_surname, student_name, s.course_year,
 m.stipend, m.payout_date
 from
 faculty f inner join student s on f.id_faculty=s.faculty_id
 inner join money m on m.student_id=s.id_student
 where
 m.payout_date = ( select distinct max(payout_date)
 from money
 where money.student_id=money.student_id)
 with check option;

insert into stud_stip values ('Partikas tehnologiju', 'Lapa', 'Jana', 2, 120, '03.12.1998');

ORA-01779: cannot modify a column which maps to a non key-preserved table

这是我得到的错误：

  create table faculty (id_faculty number(2) Primary Key, //id , 2 digits, primary key
  faculty_name varchar2(30) constraint f_name Not Null, // name, up to 30 symbols, not null
  dean varchar2(20), // dean, up to 20 symbols
  telephone varchar2(8)); //number, up to 8 symbols

create or replace view stud_stip AS
 Select f.faculty_name, student_surname, student_name, s.course_year,
 m.stipend, m.payout_date
 from
 faculty f inner join student s on f.id_faculty=s.faculty_id
 inner join money m on m.student_id=s.id_student
 where
 m.payout_date = ( select distinct max(payout_date)
 from money
 where money.student_id=money.student_id)
 with check option;

insert into stud_stip values ('Partikas tehnologiju', 'Lapa', 'Jana', 2, 120, '03.12.1998');

ORA-01779: cannot modify a column which maps to a non key-preserved table

我已经在互联网上搜索过了，没有解决我的错误，请不要给我发送关于这个问题的其他主题，因为我可能已经读过了

---

我将非常感谢你的回答。提前谢谢。

方法是在视图上创建一个而不是触发器，该触发器将依次将行插入适当的表中

由于所有

ID

列都是主键，并且您没有解释如何填充它们，因此我将使用一个序列，以相同的方式而不是触发器来完成

SQL> create sequence seqs;

Sequence created.

SQL> create or replace trigger trg_stud_stip
  2    instead of insert on stud_stip
  3    for each row
  4  begin
  5    insert into faculty (id_faculty, faculty_name)
  6      values (seqs.nextval, :new.faculty_name);
  7
  8    insert into student (id_student, student_name, student_surname, course_year)
  9      values (seqs.nextval, :new.student_name, :new.student_surname, :new.course_year);
 10
 11    insert into money (id_payout, stipend, payout_date)
 12      values (seqs.nextval, :new.stipend, :new.payout_date);
 13  end;
 14  /

Trigger created.

测试（不要在

DATE

datatype列中插入字符串！）：

---

它起作用了。既然您已经知道了该如何操作，请在必要时对其进行改进。

视图只是一个存储的查询，其名称用于引用它。它没有数据。您不会将数据添加到视图中，而是将其添加到基础表中。