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Describe Hashing in DBMS?
Hashing: Hashing is a technique to store data within an array so which storing, searching, inserting and deleting data is fast (in theory it's O(1)). For this every record requires an unique key.
The primary idea is not to find for the correct position of a record along with comparisons but to compute the position inside the array. The function which returns the position is known the 'hash function' and the array is called a 'hash table'.
What are composite objects? Objects that have other objects are known as complex objects or composite objects.
Define multivalued dependency. What do understand by trivial multivalued dependency? Ans: A multivalued dependency is a full constraint among two sets of attributes in a rela
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why older data models are being replaced by new data models.
Design a gennalization and specialization hierarchy for an automobile sales company
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What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
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