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#1 Joshieboy2007   User is offline

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PLSQL Question

Posted 13 October 2017 - 09:34 PM

I have a few tables that are related and i'm bascially trying to find out if a table has more than one instance of the foreign key and than i will update the other table if it does.

Soo as a more visual diagram.

I have a Trans(TD ,Sal) Store(NAME, TD)

So I want to basically loop through and if more than 4 books has the same instance of the same TD than will increase sal by 1.

I've thought about

select count(*)into test
from Trans
where TD in (select TD from Store);

where test is a number, but wouldn't that only just tell if there is some TD is greater than 4?

Than i thought of

select count(*)
from Trans
where TD in (select TD from Store) >= 3

But that doesn't seem to work either. Any help would be appreciated.

This post has been edited by Joshieboy2007: 13 October 2017 - 09:35 PM

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