Oracle触发器插入其他表

Question

I have 2 tables which are my_school and my_class

And " my_school " table has ' info_id ' column and also " my_class " table has ' info_id ' then I want to get a query that automatically generate " info_id " then I found solution..

Here are my working TRIGGER on " my_school " table...

---

CREATE OR REPLACE TRIGGER info_id

 before insert on my_direction 

 for each row

 begin 

 if :NEW.WAY_ID is null then 

 :NEW.WAY_ID := example_id_seq.nextval; 

 end if;

 end;

---

It works and it's generating auto id when inserting value. But now how to get this trigger do it on "my_class" table when users insert value on my_school's table then take id with "my_class" table's "info_id" column same time?

Answer 1

You can create trigger on my_school table to update info_id similar to that you have explained and while inserting records, use returning into clause.

Declare a variable to store returned value, for example

v_info_id number(9);

And use it in returning into clause

insert into my_school(column.......list) 
values (values........list)
RETURNING info_id INTO v_info_id;

Use v_info_id in your program to insert value of info_id into another tables.