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Define the terms 1) physical schema 2) logical schema.
Physical schema: The physical schema explains the database design at the physical level, which is the lowest level of abstraction describing how the data are actually stored.
Logical schema: The logical schema explains the database design at the logical level, which explains what data are keeps in the database and what relationship exists between the data.
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
recovey techniques based on deferred update and immediate update
how design database from begining
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Question: (a) Prepare an ERD for the scenario given below. (b) Convert the ER diagram produced in (a) above into its physical design. You have to choose an appropriate Pri
Define what Immediate database modification technique uses? Ans: Both undo and redo.
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What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
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