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What is logical data independence and its importance?
logical data independence 1)the ablity to modify the conceptual scheme without causing application program to be rewritten. 2)usually done when logical structure of database is altered. The logical data independence is the key side of database management system for maintaining data integrity and for maintain overall effectiveness of data usage. Logical data nouns is an important part of three schema architecture which allows the change or modification of conceptual schema short disturbing the external schema. The modifications in conceptual schema may include alteration of entities, attributes, relationships etc. Changing any of these elements will not disturb the external application programs which is a key advantage of logical information independence feature of database management systems.
Is logical grouping of information?
Logical grouping of information refers to organizing related information into categories or sections that make it easier for users to understand and navigate. By grouping similar information together, it helps users locate what they need efficiently and improves overall organization and structure.
What is logical data independence and why is it important?
Logical data independence refers to the key feature of database management system that helps maintain data integrity and the overall effectiveness of the data usage. It is very important as it allows for the modification of the conceptual schema without disturbing the external schema.
2.5 What is the difference between logical data independence and physical data independence?
The logical data independence is the ability to modify a logical schema without making external view or application program change. The physical data independence is the ability to modify a physical schema without making external view or application prrogram change.
Is it harder to achieve logical data independence or physical data independence?
It is generally considered more difficult to achieve logical data independence compared to physical data independence. Logical data independence involves separating the conceptual structure of the data from the physical storage aspects, which can be complex depending on the database design. Physical data independence primarily deals with shielding the application from changes in the storage structure, which is usually more straightforward to achieve.
What is a framework for putting all your information together in a logical sequence?
One popular framework for organizing information in a logical sequence is the "PQRST" method. This method involves breaking your information down into categories such as "Purpose," "Question," "Resources," "Structure," and "Takeaway." By following this framework, you can effectively structure and present your information in a clear and coherent manner.
Which type of the data model is being used presently?
There are three levels of data modeling. They are conceptual, logical, and physical."Conceptual" means a definition of the problem, "logical" means a design of a solution to the problem, and "physical" means the solution of the problem.
Distinguish between logical data independence and physical data independence?
logical data : refer to the immunity of the external scheme towards changes in the conceptual scheme.physical data: refer to the immunity of the conceptual scheme towards changes in the internal scheme.
How are the internal external and conceptual schemas related to concept of logical and physical data independence?
The internal schema represents the physical storage structure of data, the external schema represents how different users view the data, and the conceptual schema defines the logical structure of the entire database. Logical data independence means that the conceptual schema can change without affecting the external schemas, while physical data independence means that changes in the physical storage structures do not affect the conceptual or external schemas.
Is schema a logical structure or physical structure in oracle database?
the schema can be termed either conceptual or logical or physical. But mostly speaking, the term schema is used to refer to a logical structure.
What is global conceptual schema?
The enterprise view of the data is described by the global conceptual schema (GCS), which is global because it describes the logical structure of the data at all the sites.
What is the definition of log frame?
Log Frame stands for Logical Framework
Weber's six-point ideal type model?
Max Weber's six-point ideal type model is a framework that sociologists use to analyze and understand social phenomena. The six points are: 1) Abstracted concepts, 2) Conceptual homogeneity, 3) Logical consistency, 4) Idealized conceptual coherence, 5) Breaches of logical consistency, and 6) Empirical non-correspondence. This model helps researchers develop idealized constructs to better understand complex social realities.
What is the difference between conceptual design and physical design?
Conceptual designs attempts to identify the highest level of relationships between entities. Conceptual designs include only important entities. Physical design helps in converting the logical design into the physical form.
What is the framework that scientific research is governed by?
The answer is as follows; The rationale for incorporating the review of the literature in the research is that when you substantiate what you say, you usually substantiate it through the literature you have read. Therefore, you must document your source for your rationale and your theoretical/conceptual framework.
Explain the difference of internal external and conceptual schemas how are these schema layers related to the concept of logical and physical data independence?
External schemas allows data access to be customized (and authorized) at the level of individual users or groups of users. Conceptual (logical) schemas describes all the data that is actually stored in the database. While there are several views for a given database, there is exactly one conceptual schema to all users. Internal (physical) schemas summarize how the relations described in the conceptual schema are actually stored on disk (or other physical media). External schemas provide logical data independence, while conceptual schemas offer physical data independence.
What is logical data independence and its importance?
logical data independence 1)the ablity to modify the conceptual scheme without causing application program to be rewritten. 2)usually done when logical structure of database is altered. The logical data independence is the key side of database management system for maintaining data integrity and for maintain overall effectiveness of data usage. Logical data nouns is an important part of three schema architecture which allows the change or modification of conceptual schema short disturbing the external schema. The modifications in conceptual schema may include alteration of entities, attributes, relationships etc. Changing any of these elements will not disturb the external application programs which is a key advantage of logical information independence feature of database management systems.
