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Question: Which is more faster - IN or EXISTS?

Answer: EXISTS is more faster than IN because EXISTS returns a Boolean value whereas IN returns a value.



Category SQL In Oracle Interview Questions & Answers - Exam Mode / Learning Mode
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Question: Which is more faster - IN or EXISTS?
Answer:

EXISTS is more faster than IN because EXISTS returns a Boolean value whereas IN returns a value. Source: CoolInterview.com


EXISTS is faster than IN
Because exists returns boolean value whereas IN returns only value. Source: CoolInterview.com

Answered by: sudipta das | Date: 4/18/2008 | Contact sudipta das Contact sudipta das

EXISTS is faster than IN because Exists returns a Boolean value whereas IN returns a value. Source: CoolInterview.com

Answered by: SamirKumar Sahoo | Date: 1/23/2009 | Contact SamirKumar Sahoo Contact SamirKumar Sahoo

In many cases,EXISTS is better because it requires you to specify a join condition, which can invoke an index scan. However IN is often better if the result of subquery are very small. Source: CoolInterview.com

Answered by: Amit Mondal | Date: 5/14/2009 | Contact Amit Mondal Contact Amit Mondal

For Exists condition if condition is satisfied then it will exit, but for IN condition till upto last record it will search. Source: CoolInterview.com

Answered by: L.Rajesh | Date: 1/5/2010 | Contact L.Rajesh Contact L.Rajesh

EXISTS is faster than IN because Exists returns a Boolean value whereas IN returns a value.


Source: CoolInterview.com

Answered by: hutashan | Date: 4/26/2010 | Contact hutashan Contact hutashan


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