Implementing Trigger problem

Поиск
Список
Период
Сортировка
От oca@mvc.edu.ph
Тема Implementing Trigger problem
Дата
Msg-id 20080811051159.pug1flvkr4coso4o@mail.mvc.edu.ph
обсуждение исходный текст
Список pgsql-students

Hi,

No matter how i read the manual i can't understand it. :(

Here is what i would like to do.

for example i have

table:   classes
column:  classno,...,schedule_count

table:  schedules
column:   classno,time

I would like to create a trigger that everytime there is an insert or delete in schedules
classes.schedule_count will be updated with number of schedules entered in schedules for that particular class.  this way i could track the number of schedules for that particular class without counting the schedules.

how do i implement it?

thank you,
oscar
 

В списке pgsql-students по дате отправления:

Предыдущее
От: oca@mvc.edu.ph
Дата:
Сообщение: Re: Problem accessing View in VB6
Следующее
От: "Gregory S. Youngblood"
Дата:
Сообщение: Announcing PostgreSQL Certification Project Job Task Analysis Survey