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Question:

 Suppose we have a table “Employee” having column “age” in it. The table “employee” might have a data of different age groups according to their designations. The employee at high levels of post like Project Manager, Managing director etc has different age group when we are comparing it with other junior or senior level employees.

 

You have studied various indexing techniques for random access and better organization of data. By having a context of above scenario; if you have given an option to choose one indexing technique from two below indexes, which you would like to choose that will help to get optimized results? 

 

§         Clustered index

§         Un-clustered/Non-clustered index

 

You have to choose only one technique out of the two and give valid reasons to support your answer.


Note: Try to provide precise, to the point answer and avoid irrelevant details.

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Replies to This Discussion

it is Cluster index because  non-clustered index extra work is required to follow that pointer to the row in the table to retrieve any other desired values, as opposed to a clustered index which can just access the row directly since it is being stored in the same order as the clustered index itself.

if it is ur own gdb ans so its  btr just to gve idea bcz if instrctr found copy paste u wil also get 0 .........

regards

A very simple, non-technical rule-of-thumb would be that clustered indexes are usually used for your primary key (or, at least, a unique column) and that non-clustered are used for other situations (maybe a foreign key). Indeed, SQL Server will by default create a clustered index on your primary key column(s). As we knw , the clustered index relates to the way data is physically sorted on disk, which means it's a good all-round choice for most situations

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