3nf

DB Tables which are in 3NF or 4NF but not in DKNF

Are there examples of Relational tables which are in 3NF or 4NF but not in Domain Key Normal Form? ...

LINQ options.loadwith problem.

I am writing a tag-based ASP.net system. Using the following db scheme: Topic <many-many> TagTopicMap <many-many> Tag Basically it is a 3NF approach (toxi) that I found from the following: http://www.pui.ch/phred/archives/2005/04/tags-database-schemas.html Here is the code snippet I have: DataLoadOptions options = new DataLoadOptions...

Grails: Many-to-Many without hasMany/belongsTo - instead using native 3NF - Searching full text

I am implementing a many-to-many mapping in grails using 3NF, Not using the hasMany or belongsTo property. Taken from this article it shows and explains quite a lot about its advantages. Article: http://burtbeckwith.com/blog/?p=169 Presentation notes: http://burtbeckwith.com/blog/files/169/gorm%20grails%20meetup%20presentation.pdf I'...

Combine contents of multiple rows in 3NF mysql tables

Having dutifully normalised all my data, I'm having a problem combining 3NF rows into a single row for output. Up until now I've been doing this with server-side coding, but for various reasons I now need to select all rows related to another row, and combine them in a single row, all in MySQL... So to try and explain: I have three tab...

3NF Vs 2NF, which is more strict?

Which of these is true: If a table is in 2nd normal-form then it must be in 3rd normal-form. If a table is in 3rd normal-form then it must be in 2nd normal-form. I know only one of them is correct, if it's the first it makes sense. If it's the second -doesn't make any sense to me. Maybe an example? ...

How do you normalize one-to-one-or-the-other relationships?

I'm storing data on baseball statistics and would like to do so with three tables: players, battingStats, and pitchingStats. For the purpose of the question, each player will have batting stats or pitching stats, but not both. How would I normalize such a relationship in 3NF? ...

Translating functional dependencies into 3rd normal form

I have this problem decomposing a relation schema into a set of schemas that are in 3NF. I have this relation schema: R= (A, B, C, D, E, F) With the following set F of functional dependencies: A → ABCDEF B → C D → E Can anyone help me out? ...

Simple Database normalization question...

Hi all, I have a quick question regarding a database that I am designing and making sure it is normalized... I have a customer table, with a primary key of customerId. It has a StatusCode column that has a code which reflects the customers account status ie. 1 = Open, 2 = Closed, 3 = Suspended etc... Now I would like to have another f...

Is it still normalized db schema? database

I have the following db-schema . FILE, GROUP and BLOCK represent the object structure of the XML file. FILE is the root. GROUP has FK to FILE. BLOCK has the one FK to GROUP and the another one FK to UNIT. UNIT groups "similar" BLOCKs from diffrent GROUPs in the context of FILE. The data base is currently in 3NF. Yet I would like ...

sql 3NF Normalization

is this in 3NF ? create table movies( id numeric primary key not null default autoincrement, name varchar(50) not null, release-date Date, price numeric, rating numeric, length numeric, description varchar(1500) ); create table movies( id numeric primary key, name varchar(20) ); create table genre( name varc...