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Create 1 experiment to demonstrate an aspect of query optimisation by using access-path structures (indexes), decomposition, or denormalisation. Once satisfied with your experiment, post it as a new discussion topic to the AllQuestionsForum on moodle with the subject title _Experiment1_identifier, and the body containing a description of the experiment for all to see (you must use the format described below for your experiments) To Do:
Create 1 practical experiment following this format: Hypothesis (Reason/Theory behind proposing this experiment.): This section must include references to relevant text-books and/or web-resources. Outline what you're trying to prove; Transaction Analysis; Expected Output (how the experiment was supposed to behave); Explain - using examples and references to relevant resources - how the experiment might be expected to behave. If the results don't correlate to what you expected, make an educated comment as to how you believe the MySQL DBMS implementation affected the results. Results:
SQL Query: the exact query being tested (must be a query that clearly demonstrate your hypothesis) State of DB before change EXPLAIN output Time Taken for Query Execution Change you made to the DB (demonstrate your hypothesis) State of the DB after EXPLAIN output Time Taken for Query Execution
Account:
Detail how you carried out the experiment. Detail how you used EXPLAIN or similar DBMS tools. Detail any important considerations such as having to re-load a fresh database, turn off caching etc., state why it is necessary to prepare in the way you suggest.
Recovery Techniques: After Reading the types of failures and database errors, let us talk about how to recover from the failures. Recovery can be complete using/restoring the previ
Explain the Query Processing Data Query Processing permits a user to report or analyze structured and unstructured data pulled from multiple data sources.
Write a short note on built in function in QBE? Built in function in QBE: QBE involves various built in functions like AVG, MAX,MIN,SUM and CNT. We must prefix these operator
What is the main difference between read-only and update methods? A read-only method does not affect the values of a variable in an object, whereas an update method may alter t
You have a friend that runs a motor bike club that holds racing events at various venues on weekends, on a monthly basis. Some venues are private race tracks and some are dirt trac
What are the Requirements of algorithm designer Algorithm designer should: i) Select proper algorithm so as to minimize implementation cost ii) Find most appropriate d
Explain the Static or conservative Two Phase Locking: Static (or conservative) Two Phase Locking: In this type of scheme, all the data items are locked earlier than any opera
Process of implementing system design in dynamic models There are three essential approaches to implementing system design in dynamic models. These approaches are as below:
difference between internal schema and external schema in DBMS
What are the two methods for dealing deadlock problem? The two procedures for dealing deadlock problem is deadlock detection and deadlock recovery.
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