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Editorial Team
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Asked: 2026-05-13T17:24:34+00:00

I’m writing a query that returns whether a record is public or private. If

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I’m writing a query that returns whether a record is public or private. If the record is public, the user_id column for that record is zero. Otherwise, it is a positive integer. I’d like the query to return a one if the user_id is greater than zero and a zero if it is zero. In PHP, I would probably just cast it to a binary. This doesn’t work in mysql, but I’m hoping that there is something else that is similar. I could always use an if statement, but figured there might be something a little more elegant. 

SELECT (binary)user_id as is_private FROM mytable WHERE 1
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1 Answer

  1. Editorial Team
    SELECT  user_id > 0 AS is_private
FROM    mytable

    It will return BOOLEAN datatype which in MySQL is just a synonym for TINYINT(1)

    Note that it will not work when user_id is a NULL (it will return NULL as well), but since your question only mentions zeros and positive integers, I post this without NULL checking.

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