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recovey techniques based on deferred update and immediate update
Define Query Processing Query processing is the process of selecting the best plan or strategy to be employed in responding to a database request. The plan is then executed to
what problems are raised by the database? why is it so controversial? why is data quality an issue?
Construct a clean ans concise ER diagram for the database indicating the cardinality mapping for Employee management syatem
One-to-many : An entity in A is related with any number of entities in B. An entity in B is related with at the most one entity in A. Example: Relationship between faculty and d
What are called multilevel indices? Indices with two or more levels are known as multilevel indices.
What is meant by buffer blocks and disk buffer The blocks residing temporarily in main memory are referred to as buffer blocks. The area of memory where blocks reside t
What is Relational Algebra? Relational algebra is a Procedural query Language?
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
Consider the following relational database: STUDENT (name, student#, class, major) COURSE (course name, course#, credit hours, department) SECTION (section identifier, course#, sem
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