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Asked: 2026-06-13T15:48:28+00:00

In the users table I have a field called dob which stores the date

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In the users table I have a field called dob which stores the date of birth of the user in this format:

1959-04-02

Anyway I would like to SELECT all users who are 18 and 19 years old. This is my query:

SELECT *
FROM `users`
WHERE dob BETWEEN '1993-10-30' AND '1994-10-30'

But it only seems to select mostly 18 year olds and some (but not all) 19 year olds. I have a bunch of test users in the db and the number of 18 and 19 year olds are equal. Yet this query yields about 90% 18 year olds and about 10% 19 year olds. Why?

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1 Answer

  1. Editorial Team

    People who are between 18 and 19 years old encompass a range of birthdates over 2 years. Your query only covers 1 year. Consider reworking your logic.

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