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What do you mean by an execution plan? Why is it used? How will you view it?
a.) An execution plan can be known as a road map which textually or graphically illustrates the data retrieval methods that have been chosen by the SQL
Server query optimizer, for a stored procedure or ad- hoc query.
b.) It is used as it's a very useful tool for a developer to understand performance characteristics of a query or stored procedure.
c.) There exists an option known as "Show Execution Plan" in Query Analyzer. If this option is turned on, it would display query execution plan in separate window when query is run again.
Explain the concept of a data model ? Data Model - Model is an abstraction procedure which hides irrelevant details although highlighting details relevant to the application
3 assignments combined in 1
A Data Model in software engineering is an abstract model that organizes and documents the business data for interaction between team members and is used as a plan for creating
What are called multilevel indices? Indices with two or more levels are known as multilevel indices.
Given the following relations TRAIN (NAME, START, DEST) TICKET (PNRNO., START, DEST, FARE) PASSENGER (NAME, ADDRESS, PNRNO.) Write SQL expressions for the following queries: No
Define the five basic operators of relational algebra? Five basic operators of relational algebra are: 1. Union (∪∪∪∪) - Selects tuples which are in either P or Q or in both
Question 1 Discuss on transmission impairments Question 2 What is framing? Question 3 Write a note on 10Base2 10Base- T Question 4 Explain the rev
Problem Explain at least five relational algebraic operators with a suitable example. Note: All the above descriptions should be done by taking at least two examples from ou
why we fregment at all?
what is lossless & dependency preserving decomposition ?
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