Network data model is just like a normal database model. In network model the data is seen as related to each other by links. Or we can say the relation between the data is represented by links.
what is difference between trading and manufacturing a/c ?
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Advantages Your hands are kept free. you dont have to type things in
Network Database model was designed to solve some of Hierarchical Database Model. Specifically this solves the problem of data redundancy by representing relationships in terms of sets.ADVANTAGESOrganization: Information is grouped into entities/records and each entity has attributes, which correspond to column headings.Very efficient in retrievalConceptually simple and easy to designCan handle the diverse sort of relationships (one-to-many and many-to-many relationships)Clear line of demarcation between programs and the complex physical storage details. Application programs work independently of the data.DISADVANTAGESAll the records have to maintain using pointers thus the database structure becomes more complex. Network model large number of pointers is required to insertion, deletion and updating.
Peer to Peer network model is a way to share data amongst Devices in a WorkGroup. This method requires same Compatible Operating Systems & Common usernames along with same Protocols.
Serial Data TransmissionParallel Data transmissionAdvantagesDisadvantagesAdvantagesDisadvantagesUsed over long distancesSlower to send dataFaster than serialNot reliable over long distanceReduces requirement of wiringData may arrive at different times
two main early navigational data models were the hierarchical model and the CODASYL model (network model)
Hierarchical data model :Advantages- simplicity- data security- data integrity- efficiency- ease to add and delete recordDisadvantages- implement complexity- database management problem- lack of structural independence- programming complexity- implementation limitation- procedural access languageNetwork data model :Advantages- easy to access data- can handle more relationship types- data independence- data integrity- data independenceDisadvantages- system complexity- lack of structural independence- procedural access language
Entity-relationship model advantages and disadvantages AdvantagesDisadvantagesConceptual simplicityVisual representationEffective communicationIntegration with the relational database modelLimited constraint representationLimited relationship representationNo representation of data manipulationLoss of information
disadvantages in data manual processing
There are both advantages and disadvantages of data collection methods in statistics. The main advantages are the metrics and correlation one can draw from statistics. The disadvantages stem from sampling errors.
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advantages of object oriented data base
Advantages and Disadvantages of primary data are: Advantages 1. Data is basic 2. Unbiased information 3. Original data 4. Data from the primary market/ population 5. Data direct from the population. Disadvantages. 1. Large volume of data. 2. Huge volume of population. 3. Time consuming 4. Direct and personal intervention has to be there. 5. Raw data.
Advantages: Protects individual privacy by regulating how personal data is processed. Helps prevent misuse of personal information by organizations. Gives individuals control over their own data. Disadvantages: Compliance costs for businesses can be high. Some argue that it limits the ability to use data for beneficial purposes. Enforcement and penalties for violations can vary.
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distorted data