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What are two ways that database software makes numeric data storage and use easy and fast?
1. What are two ways that database software makes numeric data storage and use easy and fast?
What are the problems in data redundancy?
1. Wasted Storage Space. 2. More difficult Database Updates. 3. A Possibility of Inconsistent data. Note: A solution to the problem is to place the redundant data in a separate table, one in which the data no longer will be redundant.
What methods are there of entering data into a Database?
Data in a database table can be inserted by the help of Data Manipulation Language, by writing query in language like Sql.
What is the repetition of data in a database called?
its called data redundancy.
How data in a database can be incorrect?
a data can be inncorrect if the user is impatient.
Difference between logical database and physical database?
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.
What is the difference between logical database and physical database?
A logical database refers to the way data is organized, modeled, and accessed by users, focusing on the structure and relationships of data. In contrast, a physical database relates to how data is actually stored on disks, including indexes, partitions, and access paths designed for efficient data retrieval and storage.
What is a logical database?
A logical database is the structure of data. It is the different pieces of information and the relationships between them.
What is the difference between tablespace and a table?
A tablespace is a logical storage unit that contains segments, like tables and indexes, while a table is the structure within a database that stores data in rows and columns. Tables are stored within a tablespace, which provides the physical storage for the table's data.
What is a collection of data that is stored in a logical and structured way?
A database is a collection of data that is stored in a logical and structured way, typically organized in tables with rows and columns. It allows for efficient retrieval, storage, and manipulation of information in a systematic manner.
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.
Compare the three level of ansi-sparc?
Conceptual database design is the process of constructing a model based on the enterprise. Logical database design is the process of constructing a specific data model. Physical database design is the process of producing of the database on the secondary storage.
Show the difference bw 3-levels of data abstraction in DBMS?
The three levels of data abstraction in a DBMS are physical, logical, and view. Physical level: Describes how data is stored in the database, including details like data storage and access paths. Logical level: Focuses on the structure of the data in the database, including schemas, tables, and relationships. View level: Represents how users view the data, providing a customized and simplified representation of the data to different user groups.
Why does a teacher use database?
it because database is the largest storage when it comes data.
What is a logical database designer?
* Logical database design: * ensuring, via normalisation procedures and the definition of integrity rules, that the stored database will be non-redundant and properly connected; * Physical database design: * specifying how database records are stored, accessed and related to ensure adequate performance. What is logical database designerThe major role of logical database design is to transform the combined, reconciled data specifications into basic or atomic elements following the well established rules for well structures data specifications. With a complete logical database design in place an analyst begins to specify the logic of the particular computer programs and queries needed to maintain and report the database content. The person who maintain or responsible to perform the above task is known as Logical Database designer.
What does logical data type in a database mean?
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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.
