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Editorial Team
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Asked: 2026-05-17T21:39:02+00:00

Assumptions for question: Database Agnostic Both queries will return just one row due to

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Assumptions for question:

  1. Database Agnostic
  2. Both queries will return just one row due to the values of X and Y

Question:

Which query is faster, and is one a better practice?:

SELECT * FROM my_table WHERE X = 'some value' AND Y = 'other value';

Or

SELECT * FROM my_table WHERE X = 'some value';

Basically, do you benefit or lose (performance-wise) from passing extra unneeded parameters into a query, and if “benefit” is the answer, is it a “good” practice?

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1 Answer

  1. Editorial Team

    Clearly the query with more parameters needs to do more work, but I think you will find in most cases that the difference will be so trivial as to make it a moot point.

    The best practice is to write a query in such a way that solves your business problem and let the chips fall where they may. If you obviously know that a parameter is redundant then leave it off, if for no other reason than to simplify your code. However, I wouldn’t spend a great deal of time going to look for situations where a parameter is redundant because of the current state of the data.

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