Tagged Questions

-1
votes
0answers
55 views

Effects of good and bad database designs [closed]

I want to know what effects good and bad database designs have. Any ideas which can be added to the list below will be very helpful: Effects of a good database design: Little or no data redundancy ...
1
vote
1answer
81 views

Approach for a 2,000 table migration

What might be the best approach when converting or migrating a database containing over 2,000 tables? Where would you begin to tackle such an issue? Steps to take in the first weeks of designing? ...
0
votes
3answers
53 views

Column partially determining accepted values of another column, should be somehow normalized?

I have a table that describes a set of properties (yes it's metadata, in this case there's a valid reason to have it in the database); among other things I tell the type of the data that can be ...
1
vote
1answer
31 views

Adding users to a list and sort by category?

I'm using SQL-Server 2012 and I would like to know how to solve this program. So: I want to create a page that allows admins to manage a project, and part of it, would be to add members/employees to ...
0
votes
2answers
60 views

Academic Journals and Reviews for Database Systems [closed]

I want to start reading up on the latest advances in database technology. Can anyone tell me what are the leading academic journals on the subject? Also, I have a friend doing a PhD in another area ...
1
vote
1answer
100 views

Deriving formulas for input/output

I'm currently enrolled in a DBS class and am having problem with an assignment. I've searched around and have been unable to understand what it is I'm meant to be doing with this derivation formula. ...
0
votes
1answer
186 views

Keep total transaction in invoice application

I want to make an application called as Invoice Application with MySQL database. Now I have designed this database. Now I want to know is this database good for Invoice Application. I will use MySQL ...
1
vote
1answer
493 views

Planning simple CMS: How much relation?

I'm currently in the process of designing the database for a rather minimalistic Content Management System I'm working on alone. It should allow scalability while remaining speed, especially on boxes ...
0
votes
1answer
126 views

Database column vs row size

I have Column A and Column B in a single table. I need to add 1,000,000 records to this table. I have 2 options: Keep 2 columns and add 1,000,000 records Add more columns and flatten out the ...
2
votes
5answers
531 views

Does 'Cities' deserve a separate table?

I have the following Customers table: customer_id - int company_name - nvarchar street - nvarchar city - nvarchar comments - nvarchar The app will only be used in part of one small country ...
2
votes
1answer
240 views

Under what conditions are polymorphic associations used? What are the alternatives?

As I understand it, polymorphic relationships among tables in a database allow one table to have one foreign key that references many tables. I have found that tags are a common application of this ...
3
votes
2answers
485 views

Ready-to-Use Database models example

Where can I find ready-to-use database models ? I don't need a database with data in it, but only schemas (UML diagrams). Perhaps something like the data models at this link, but much more complex ...
0
votes
3answers
317 views

SQL Server : primary keys advice to my whitepaper needed

I've tired to explain to every new junior developer in our r&d team why he should use Primary Keys and how to do that. So I decided to write small whitepaper, which every new developer should ...
15
votes
1answer
478 views

What is the reasoning behind the CAP theorem?

http://en.wikipedia.org/wiki/CAP_theorem http://www.cs.berkeley.edu/~brewer/cs262b-2004/PODC-keynote.pdf I think it is not very straightforward why only two of Consistency Availability Partition ...