In a One to Many association between a Parent T开发者_开发技巧able and Child Table. Is it ok to make the Foreign key on the Child table as the Primary key on the same child table.
I have often wondered why MySQL has become so popular. Any ideas why? Are there specific reasons behind its success? (Ple开发者_StackOverflowase keep answers analytical)
I need to build an activity feed (stream? A \"lifestream\" to be more accurate.) for a system similar (same) in resemblance to many popular social networking platforms. My initial attempt was to use a
I want to store the list of users who have 开发者_JAVA百科voted on an article. Also want to avoid same user from re-voting again.
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing
I would like to learn how to persist data to a RDBMS from Objective-C, and I don\'t really know where to start to learn this.Do I learn a RDBMS? Do I learn data modeling?
I am using Hibernate 3 as my persistence framework. Below is the sample hbm file I am using. <?xml version=\"1.0\"?>
This is really difficult question to ask. So here goes. The following sql: select * from Survey_Answers
I\'m wondering if it\'s a sane idea to use Active Directory to store entities related to an application, when not all entity types are the traditional AD-entities such as organizational unit, user, gr
I am thinking of database schema for post and its comments, in context of a social networking application and im wandering which开发者_开发百科 of these two would give better performance:
加载中,请稍侯......