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Editorial Team
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Asked: 2026-06-16T04:47:28+00:00

I want to return rows from a MySQL table only if the count of

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I want to return rows from a MySQL table only if the count of the number of rows matching an index meets a certain number.

Here’s the issue: I have a table of user reviews that are indexed by username. Therefore, I have many rows with different reviews all indexed by usernames. I am creating a search filter, so I need to return the usernames of people who have a certain number of reviews (ie. number of review rows in the table).

How would I create a MySQL query that would pull only usernames of people say that have 4 reviews (4 table row entries)?

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1 Answer

  1. Editorial Team

    This sounds to be a simple GROUP BY and COUNT() aggregate using a HAVING clause to limit to those with 4 reviews.

    SELECT
  username,
  COUNT(*) AS num_reviews
FROM
  user_reviews
GROUP BY username
/* Limit to those with 4 reviews */
HAVING num_reviews = 4

    Review the aggregate functions reference for information on how GROUP BY is used. The HAVING clause is applied after the GROUP BY and is used to limit its results.

    http://sqlfiddle.com/#!2/9dc86/1

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