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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
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
What is conceptual model ? A conceptual model is a independent of both hardware and software.
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
Explain Instance and schemas? Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Introduction In large projects, we can have many different companies working together. Generally, the project or contract is awarded to one company (Principal Contractor), which
courier company er-diagram
please give me introduction to full data in D B M S in a short assignment
Explain ODBC? ODBC - Open DataBase Connectivity (ODBC) enable the integration of SQL along with a general-reasons programming language.
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