DATA MODELS in DBMS
Object Based Logical Models
b) The object-oriented model.
c) The semantic data model.
d) The functional data model.
Record Based Logical Models
1. Relational model.
2. Network model.
3. Hierarchal model.
Physical Models
1. Unifying model
2. Frame memory model.
Relational model
Network model
Hierarchal model.
DATA MODELS
The entire structure of a database can be described using a data model. A data model is a collection of conceptual tools for describing Data models can be classified into following types.
- Object Based Logical Models.
- Record Based Logical Models.
- Physical Models.
Explanation is as below.
1.Object Based Logical Models:
These models can be used in
describing the data at the logical and view levels.
These models are having
flexible structuring capabilities classified into following types. a) The
entity-relationship model.
b) The object-oriented model.
c) The semantic data model.
d) The functional data model.
2.Record Based Logical Models:
These models can also be used
in describing the data at the logical and view levels.
These models can be used for
both to specify the overall logical structure of the database and a
higher-level description.
These models can be classified
into,
1. Relational model.
2. Network model.
3. Hierarchal model.
3. Physical Models:
These models can be used in
describing the data at the lowest level, i.e. physical level.
These models can be classified
into
1. Unifying model
2. Frame memory model.
DATA MODELS in DBMS, Object Based Logical Models, Record Based Logical Models, Physical Models, object-oriented model, semantic data model, functional data model, Unifying model, Frame memory model
0 Comments