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Explain Data Dictionary in short?
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
Define two-phase locking protocol. Ans: Two-phase locking is significance in the context of ensuring that schedules are serializable. The two-phase locking protocol defines a p
Explain five duties of Database Administrator? 1. DBA administers the three stages of the database and, in consultation along with the whole user community, sets up an defin
What are the types of reference?explain it with suitable examples? Object oriented language given the ability to refer the object attribute of the type can be referred to the s
While using extract datasets it is required to have a special workarea for interface False. It is not required to have a special workarea for interface
What are the aggregate objects in the data dictionary? Views Match codes Lock objects.
Problem 1 Why are the operational system keys not recommended for forming data warehouse primary keys? Give any two examples 2 Explain the following performance tuning techn
Strict 2PL :Though, this basic 2PL suffers from the trouble that it can result into loss of isolation / atomic property of transaction as theoretically speaking once a lock is rele
explain the steps for reduction of er model into relational model?
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