data abstraction in dbms - Wikitechy https://www.wikitechy.com/interview-questions/tag/data-abstraction-in-dbms/ Interview Questions Wed, 26 Oct 2022 06:51:00 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png data abstraction in dbms - Wikitechy https://www.wikitechy.com/interview-questions/tag/data-abstraction-in-dbms/ 32 32 Explain levels of abstraction in DBMS ? https://www.wikitechy.com/interview-questions/dbms/explain-levels-of-abstraction-in-dbms/ https://www.wikitechy.com/interview-questions/dbms/explain-levels-of-abstraction-in-dbms/#respond Wed, 26 Oct 2022 06:48:51 +0000 https://www.wikitechy.com/interview-questions/?p=5017 There are 3 levels of abstraction in DBMS

Physical Level

  • It is the lowest level of data abstraction and is managed by DBMS.
  • This level shows how the data is stored in the database.
  • Data storage descriptions and details of this level are hidden from system admins, developers, and users

Logical Level

  • Logical level is the second level in data abstraction, which states the type of data and the relationship among the data that is stored in the database.
  • It is a level on which system admin and developers work.

View Level

  • This is the highest level of data abstraction, which shows/states only a part of the database.
  • View level is a level that describes a part of the database and hides the details of the table and its schema and storage from its users.
  • The result of a query is an example of view-level data abstraction.
  • A table created by selecting fields from one or more tables present in the database can be shown using this view.

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