PHP PDO Forberedt sætning bind NULL værdi

Dette er din forespørgsel:

SELECT c.*, COUNT(d.servername) as servercount, d.controller
FROM customers C JOIN
     customerdata d
     ON c.id = d.customer
WHERE isVdi = :isVdi AND d.controller = :controller
GROUP BY d.customer
ORDER BY c.name ASC, c.environment ASC;

Desværre er alt = NULL vil aldrig vende tilbage sandt. Endnu mere desværre understøtter MySQL ikke ANSI-standarden NULL -safe comparator is not distinct from . Men heldigvis har den et alternativ. Du kan prøve dette:

SELECT c.*, COUNT(d.servername) as servercount, d.controller
FROM customers C JOIN
     customerdata d
     ON c.id = d.customer
WHERE isVdi = :isVdi AND
      d.controller <=> :controller
GROUP BY d.customer
ORDER BY c.name ASC, c.environment ASC;