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What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
What is hashing file organization? In the hashing file organization, a hash function is computed on some attribute of every record. The result of the hash function specify in
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
Explain four causes for failures in data warehouse projects
What will be create when a primary key if combined with a foreign key? A primary key if combined with a foreign key it creates Parent-Child relationship between the tables that
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
Problem 1. Write the SQL queries using Data Manipulation Language (DML) statements. Insert values into student table with field names using insert command Display the
Question 1 Create a table student with attributes student name, roll number, total marks and percentage. Do the following operations Insert details in to the table Update
Boyce-Code Normal Form (BCNF) A relationship is said to be in BCNF if it is already in 3NF and the left hand side of each dependency is a candidate key. A relation who is in 3N
Write a short note on oracle Instance? Oracle Instances: An instance is the (executed) Oracle software and the memory they use. It is the instance which manipulates the data s
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