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Asked: 2026-05-10T23:40:03+00:00

In this query: SELECT COUNT(*) AS UserCount, Company.* FROM Company LEFT JOIN User ON

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In this query:

SELECT COUNT(*) AS UserCount, Company.* FROM Company LEFT JOIN User ON User.CompanyId = Company.Id WHERE Company.CanAccessSystem= true AND(User.CanAccessSystem IS null OR User.CanAccessSystem = true) GROUP BY Company.Id

I want to query a list of companies that can access a particular system as well as the number of users who can access the system inside the company.

This query works for all cases except for one very important one. If a company can access a the system but none of the users can, the Company disappears completely from the query (i.e.: Users.CanAccessSystem = false). In that case, I just want the UserCount = 0.

Example From Companies that Can Access the System:

Users   Company Name 1       WidgetWorks 3       WidgetCompany 0       WidgesRUs

This system is on MySQL

Query Edit: Fixed a Typo ‘ON User.CompanyId = Company.Id’

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1 Answer

  1. The reason that your result doesn’t work is because you don’t have any join clause. 

     SELECT IFNULL(COUNT(User.Id), 0) AS UserCount, Company.*  FROM Company LEFT JOIN User ON User.CompanyId = Company.Id AND User.CanAccessSystem = true WHERE Company.CanAccessSystem = true GROUP BY Company.Id

    That should work. The point with a left join is that the master table-entries should always appear, however left joined entries doesn’t have to.

    the IFNULL() is only for returning 0 since no appropriate users will render a NULL-value in this case. I’m not really sure how you handle boolean values in MySQL since it doesn’t support it natively.

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