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The disconnected
environment allows data
retrieved from the data
source to be manipulated and later reconciled with the data
source. The disconnected
classes provide a common way to work with disconnected
data
regardless of the underlying data
source. They include the DataSet, DataTable, DataColumn, DataRow, Constraint, DataRelationship, and DataView classes.
What else can I help you with?
What kind of data cable did you disconnect?
What types of cables were disconnected?
Explain data model?
Explain data model?
Define data models and list different types of data models?
A data model is a collection of concepts that can be used to describe the structure of a database and provides the necessary means to achieve this abstraction whereas structure of a database means the data types,relationships and constraints that should hold on the data. Data model are divided into three different groups they are 1)object based logical model 2)record based logical models 3)physical models Types: Entity-Relationship (E-R) Data Model Object-Oriented Data Model Physical Data Model functional data model
What is data model?
In computer science, data modeling is the process of creating a data model by applying a data model theory to create a data model instance. A data model theory is a formal data model description.For the source and more detailed information concerning your request, click on the related links section (Answers.com) indicated below.
What is the lowest data model?
The lowest data model is the physical data model. It represents how data is stored on a specific type of hardware and helps optimize storage and retrieval. It is the closest to the physical implementation in a database system.
What is the diffrece between disconnected and connected environment?
Connected environment is one in which a user is required to be constantlyconnected to the Data Source while performing any operation in-order to keep the data up-to-date, whereas in Disconnected environment no constant connection to the Data Source is required.Moreover in connected environment the data concurrency effects can beeasily resolved but Connected environment causes network traffic. But in Disconnected environment since the user is not directly connected to the data source, the user can connect to the data source as and when required and hence it allows for Multiple applications to simultaneously interact with the Data Source. It also improves the scalability and performance of the applications.Few more differences can be contributed as the Connected Environment uses Datareader while the Disconnected one uses Dataset. This results in the fact that Connected Environment is Slower in speed in comparison to Disconnected environment for DML Operations. But as far the Connected Environment is concerned we get updated data and less chances of Dirty read, whereas Disconnected environment suffers from the major problem of Dirty read.Thanks & Regards,Shoaib R Khan - SRK
What happens when you end a disconnected session running on the remote server?
All unsaved data are lost.
What are the Classification of data model?
Data models can be classified into three main categories: conceptual data model (high-level view of the data and its relationships), logical data model (detailed structure of the data and relationships), and physical data model (implementation of the database design on a specific database management system).
What Data model is said to be a semantic data model?
An Entity-Relationship (ER) model is commonly referred to as a semantic data model. It focuses on defining the entities, attributes of the entities, and the relationships between entities to capture the meaning of data in a domain. This model helps to visualize and understand the semantics of the data being represented.
Advantages of flat data model?
two main early navigational data models were the hierarchical model and the CODASYL model (network model)
What is a record-based data model?
-> A record based data model is used to specify the overall logical structure of the database.-> In this model the database consists of a no. of fixed formats of different types.-> Each record type defines a fixed no. of fields having a fixed length.-> There are 3 principle types of record based data model. They are :1. Hierarchical data model.2. Network data model.3. Relational data model.
What is the data modeler?
Physical Data Model
