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what are the main characteristics of database
prototype of a distributed information system for a national car part retail outlet chain.
Give some encryption techniques? A) DES B) AES C) Public key encryption
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
What are composite attributes? Composite attributes can be separated in to sub parts.
Timestamps For Read operations: If TS (T) If TS (T) >= W-timestamp (Q), then the transaction T is trying to read a value of data item Q which has been written and committed
Explain the Weak Entity Set An Entity set which does not have sufficient attribute to make a primay key is known as weak entity set. For instance, dependents of an employee in
Project Description: We have an encrypted HSQL Database which we want to change into csv format. HSQL DB . We have java application (jar file) which reads that database but n
Q. Define a weak entity set and its identifying relationship. List the necessary conditions for a meaningful identifying relationship set of a weak entity set. Entity is a t
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