Explain the term optimization and performance tuning
Explain the term optimization and performance tuning and its work in practical projects?
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Performance tuning and optimization of a query includes collecting statistics on link columns, ignoring cross product join, selection of suitable primary index (to ignore skewness within storage) and by using secondary index. Ignoring NUSI is advisable.
Illustrate the five SQL built-in functions.
Illustrate why informational and operational systems are separate?
Describe how we can add a NOT NULL column to a table?
Specify the difference between the ER Modeling and Dimensional Modeling?
Write a brief note on a distributed database?
Describe briefly the different methods of loading Dimension tables?
Describe how operation is carried out within the spiral method?
Which data providers can be combined in one report?
Explain the reusable transformation?
Explain the Filter transformation?
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