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Define DBA database administrator?
DBA: A database administrator (DBA) is a person who is responsible for the environmental aspects of a database. In common, these involves:
Recoverability - Creating and testing Backups Integrity - Verifying or helping to verify data integrity Security - Defining and/or implementing access controls to the data Availability - Ensuring maximum uptime Performance - Ensuring maximum performance Development and testing support - Helping programmers and engineers to economically utilize the database
Gaps in sequence values can happen when: - A rollback happens that is when a statement changes are not accepted. - When the system crashes - When a sequence i
Determine object representation As a designer, we must choose properly that when to use primitive types in representing objects and when to combine groups of related objects,
random file orgnization
What are the several kinds of the update operations on relations? Also explain the constraints on these update operation. Give instance in support of your answer. There are th
Explain the cartesian product in Database Management System
Differentiate between horizontal & mixed horizontal fragmentation?
1. Create a subroutine that does the remote blast on the file protein.fa. 2. Pass that returned files from the blast to another subroutine that parses the output and sends it to
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
Haw does it work one database application
Explain the database Planning Project ?
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