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Explain data abstraction?
Data abstraction Data abstraction is a methodology in which enables us to isolate how a compound data object is utilized from the details of how it is constructed from more primitive data objects.
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the
#explain five disadvantages of a dbms..
Funky Festivals Specification Funky Festivals organise music festivals which take place at various venues throughout the UK. A venue needs to be booked before a Festival can t
Differentiate between static hashing and dynamic hashing. Ans: Static Hashing comprises the number of primary pages in the directory fixed. So, while a bucket is full, we requ
SET concept is used in which type of modelling? SET concept is used in Network Model.
A B-tree of order how much children m has maximum ? m has maximum m mchildren in a B tree.
Consider a relation s over the attributes A and B with the following characteristics: 5,000 tuples with 10 tuples per page A 2-level B+ tree index on attribute
how many types of data model in DBMS? explain data abstraction with its different level
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
courier company er-diagram
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