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Editorial Team
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Asked: 2026-05-17T06:27:30+00:00

I have a question about equivalent search result, that can occur on different fields.

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I have a question about equivalent search result, that can occur on different fields.

Let’s say I record the logical deletion state of records with 3 fields like :

  • Boolean Deleted
  • Date DeleteDate
  • String DeleteUserName

The goal of the query is to avoid having deleted records into my selection.
So I can search the first field with only 2 values (True/False), or on the deletion date : a lot of different values, or on the username, different values but not a lot.

What will give the best search result time, regarding the index usage ?

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1 Answer

  1. Editorial Team

    If you’re doing:

    SELECT * FROM table WHERE 'deleted' = 0

    (In that format) then it would be the fastest: The others don’t search faster or slower, however, there is less overhead required to compare Bools than to compare Strings/Dates. (Usually, aspects of different systems change, some Bools are stored as 8-bit, and not optimized per equality testing)

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