Flashcards
Databases
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- 1ANSI-SPARC Three-level arcitecture• External Level - Users’ view of the database, the part of database that is relevant to a particular user.
• Conceptual Level – this one contains the logical structure of the entire database seen by the database administrator. All tables and relationships between tables, constraints on the data, security information, and so on.
• Internal Level - Physical representation of the database on the computer, how the data is stored in the database. For example, what data structure is used, how many bytes used.
Below the internal level is the physical level, managed by OS under the direction of DBMS.
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- Computer Science Flashcards on Databases, created by Ben McDonald on 12/04/2023.
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- Ben McDonald
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