Fringe Division Index du Forum
Fringe Division Index du ForumFAQRechercherS’enregistrerConnexion

Normalization Of Database Tables Pdf Download

Poster un nouveau sujet   Répondre au sujet    Fringe Division Index du Forum -> Divers -> Quêtes
Sujet précédent :: Sujet suivant  
Auteur Message
Protecteur aguéri
Protecteur aguéri

Hors ligne

Inscrit le: 14 Avr 2016
Messages: 115
Localisation: Marseille
Tranche de Lvl: 171-180
Alignement: Brâkmarien
Point(s): 115
Moyenne de points: 1,00

MessagePosté le: Sam 3 Sep - 07:43 (2016)    Sujet du message: Normalization Of Database Tables Pdf Download Répondre en citant

Normalization Of Database Tables Pdf Download >

Insertion Anamoly : Suppose for a new admission, we have a Student id(Sid), name and address of a student but if student has not opted for any subjects yet then we have to insert NULL there, leading to Insertion Anamoly. To understand these anomalies let us take an example of Student table. If any column depends only on one part of the concatenated key, then the table fails Second normal form. The dependency between zip and other fields is called transitive dependency. Normalization Rule Normalization rule are divided into following normal form.

To achieve second normal form, it would be helpful to split out the subjects into an independent table, and match them up using the student names as foreign keys. Second Normal Form (2NF) As per the Second Normal Form there must not be any partial dependency of any column on primary key. Normalization is a systematic approach of decomposing tables to eliminate data redundancy and undesirable characteristics like Insertion, Update and Deletion Anamolies. " . New Student Table following 2NF will be : StudentAge Adam15 Alex14 Stuart17 In Student Table the candidate key will be Student column, because all other column i.e Age is dependent on it. Now, both the above tables qualifies for Second Normal Form and will never suffer from Update Anomalies. Also in the above Table in First Normal Form, while the candidate key is {Student, Subject}, Age of Student only depends on Student column, which is incorrect as per Second Normal Form.

pro e cam pdf downloadsex and the city book pdf downloadfreedom from fear and other writings pdf downloadfree download pdf printer for windows 7joseph prince destinados a reinar pdf downloadamerican english file 2 teachers book pdf free downloadroberto saviano gomorra pdf downloadacute disseminated encephalomyelitis pdf downloadmyers psychology for ap pdf downloadmapa de rotterdam pdf download

Revenir en haut

MessagePosté le: Sam 3 Sep - 07:43 (2016)    Sujet du message: Publicité

PublicitéSupprimer les publicités ?
Revenir en haut
Montrer les messages depuis:   
Poster un nouveau sujet   Répondre au sujet    Fringe Division Index du Forum -> Divers -> Quêtes Toutes les heures sont au format GMT + 2 Heures
Page 1 sur 1

Sauter vers:  

Index | Panneau d’administration | créer un forum | Forum gratuit d’entraide | Annuaire des forums gratuits | Signaler une violation | Conditions générales d'utilisation
Template lost-kingdom_Tolede created by larme d'ange
Powered by phpBB © 2001, 2005 phpBB Group
Traduction par :