1. Data dependence Data illustration incorporates with the requisition function. If there is alteration in the Data, then also there is a difference in the application function. Data independence Data depiction incorporates with operation function. If there is a transition in the Data, it won’t cause a shift in the application program.

2. Structured data
It is established data which could efficiently be reclaimed and reserved in the databases as well as warehouses. It assign to the substantial case of the user's situation such as phenomenon and development.

Unstructured data It consists of combined use of several media data like pictures, sounds, and video clips. Then, it is reserved as the element of the user's field situation

3. Data
It is the illustration of articles and episode which are reserved and acknowledged in the system. It persists in a array of form such as numeric, symbols, 3RQ variables, and so on. For example, database in dr's clinic will have information such as patient name, address, diagnosis, symptoms, and phone number.

Information
These are the refined data which elevates the information of the specific using it. Data are worthless in their current prospective from so it is pre-refined and illustrated as the information to the user

4. Repository
It is the rationalised reserved area for data meaning, table, data relationships and other parts of data system. It encloses a metadata for business departments of the information system. Database It is a systematised data assembling, and whole data existing is linked to each other in any way. It accomplishes the happening of data to meet the needs of the user in businesses.

5. Entity
Component is the essential block to generate the information accumulated about individual, spot, situation or thing. Substances speak to traits which may contain} several occasions. For instance: COLLEGE SCHOLAR, EMPLOYEE. Information Management Principles

Enterprise data model
It's the underlying stage in the product advancement and can determine the amount and general element from the hierarchical database. The actual graphical version of the database applied by the association

6. data warehouse
Combining the information structure one particular or more sources and after that making a vault of information can be known as a warehouse. It is synchronised choice bolster database. This contains the recorded data and breaks down the data

ERP system
In enterprise level, it combines the operational data, in addition to business level, it has a build-in all the aspects many of these as marketing, production, product sales, revenue, and so on.

7. two-tier databases
This keeps up the consumer interface business rationale and client interface in the customer gadgets

Multitier databases
This keeps up client user interface in the customer as well as the business rationale upon numerous server layers

8. systems development life cycle
- SDLC gives the planning to add to an information structure wander. It suggests the end-to-end methodology of sketching out, building, and passing on an information System (IS) that will meet the requirements of the business frames.

Prototyping a sort of quick application change. In prototyping, stages, for instance, orchestrating, examination, and setup is executed at the same time and the result is passed on to the customer. The cycle is reiterated until it meets the customer requirements.

9. enterprise data model
It is the basic stage in the item progression and decides the degree and general substance of the definitive database. It makes the graphical model of the database used by the affiliation

Conceptual data model
It is the yield of the sensible showing stage and development of the endeavor data model. It records the data and its relationship with the database. 10. prototyping
It is the yield of the reasonable displaying stage and expansion of the undertaking information model. It records the information and its association with the database.

agile software development
It is procedure which performs the organizing firsts and performs the examination, plan stage again and again until the business system is satisfied and after that it is executed as structure programming. It is used for fitting systems that recover data and to refine the need of the customer for another structure