Re: Lookup tables
От | Rob Sargent |
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Тема | Re: Lookup tables |
Дата | |
Msg-id | 868eea77-7a0c-4fca-b9a3-7a38ffe5087f@gmail.com обсуждение исходный текст |
Ответ на | Re: Lookup tables (Ron Johnson <ronljohnsonjr@gmail.com>) |
Ответы |
Re: Lookup tables
|
Список | pgsql-general |
On 2/4/25 10:03, Ron Johnson wrote:
On Tue, Feb 4, 2025 at 11:31 AM Michał Kłeczek <michal@kleczek.org> wrote:[snip]
The query to register a visit is:
insert into restaurant_visit
select $user, current_date, restaurant_id, $rating
from restaurant where name = $restaurant_name
It is now completely unclear what it means to change the name of the restaurant for already registered visits.
Is it still the same restaurant with a different name or a different restaurant?
Or let say someone swaps names of two restaurants.
That means a user that goes to the same restaurant every day would register visits to two different restaurants!Valid concerns, which means that you add a new restaurant record when the name changes.
And there goes your unique index on phone number :)
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