logical organization
primary file organization says that how data itself is stored on the storage device. a secondary logical maintinance of physically stored data that helps us to speed access to the physically stored data.
Hi, Data Independence refers to the immunity of user application to make changes in the definition and organization of Data. There are three types of Data Independence - 1. Logical Data Independence - The ability to change the logical (conceptual) schema without changing the External schema (User View) is called logical data independence. 2. Physical Data Independence - The ability to change the physical schema without changing the logical schema is called physical data independence. 3. View Data Independence - always independent,no effect.
A logical data model (LDM) in systems engineering is a representation of an organization's data, organized in terms of entities and relationships and is independent of any particular data management technology.
A repository containing information about data: their meaning, logical organization, type, relations, source, usage, classification, security policies, etc..
A logical database refers to the conceptual schema or model of data relationships and structures, independent of how data is stored or accessed. On the other hand, a physical database involves the actual implementation of the database on a specific hardware system, detailing how data is stored and accessed. The logical database design focuses on the organization of data, while the physical database design focuses on optimizing performance and storage efficiency.
Addresses, Numbers, Characters, Logical Data (source: Computer Organization and Architecture, William Stallings)
Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.Any kind of data, including text, numbers, dates, times and logical data can be entered into a cell.
A logical unit of data is a virtual representation of data while a physical unit of data is the actual storage of data on a physical device. The logical unit of data is how data is organized and manipulated from a software perspective, while the physical unit of data is how data is stored on hardware such as disks or memory.
A schema separates the physical aspect of data storagefrom the logical aspects of data representation.
A schema describes the structure and organization of a database. It defines the tables, attributes, relationships, constraints, and data types that make up the database. It is like a blueprint that ensures data integrity and consistency.
Logical file is a type of file that provides a view of the data stored into the Physical file. It does not contain data. A logical file contains only an index to the data stored into the physical file.
the logical data independence is hard to achieve because all the manipulation is belonging in logical data independence but in physical data independence only show the physical view .