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Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
what is database management system? & why it is required?
Define Physical and Logical independence Ans: Physical data independence: The ability to modify physical level without causing application program to be rewritten. Logic
Aggregation Aggregation is stronger form of association. It represents the "has-a" or "part-of" relationship. An aggregation association depicts a complex object which is comp
what are the type of the database
how many hourse have been spent on a certain project
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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
need to get answer for questions 3&4 on this page in part 1
1. A company wants a report containing a breakdown of payroll by department. Input, which should be stored in 3 parallel arrays, includes each employee's department number, hourly
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