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And I'm just here,Constantly called Delt .-. |
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http://31.media.tumblr.com/7b787b5f8...vtljo1_500.gif |
Well I'm off to sleep Cya guys ^^ |
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No I know there are Alternative keys and Unique keys, but I'm still left clueless on which one refers to where and which combination should be used :p |
I'm still here~ |
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I could take a look and see if there's anything I could help with~~ :))) |
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I don't have the question, so I could only assume what's going on, so~~~ Anyways, 4 primary keys = concatenated key, meaning that each of the element is the primary key of one table AND is needed in that table with 4 primary keys~ So, you have, like, 5 tables (or more). 4 tables with 1 primary key each and 1 table with 4 primary keys. e.g [all first element is primary key for first 4 table] NAME(firstname,lastname) DOB(year,month,date) address(area,street,block) parent(parent_firstname,parent_lastname) For instance, if the person go apply for school, he would need present a documentation that consists of first 4 tables, the school would tabulate a new table to store in database~~ Like, student_profile(firstname,year,area,parent_firstname,class,teacher) e.g (Tan, 2013 ,Chinatown, Ah Beng ,1a, Mr Chan) Hope that helps~ |
Double poster is double poster. |
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And while I was typing all that, I was totally expecting someone to post something since, this is the GCT (18mins of peace is unheard of here), but it just sort of died right at that moment, so... yeah~~ *shrugs* |
haters gonna hate 8) |
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