Mysql count return Zero if no record found

Question

I have a two tables.

cities - id_city, city_name
properties - id_property, id_city, property_name

I want to display cities.city_name<

Answer 1

Use an outer join:

select cities.city_name, count(properties.id_city)
  from cities left join properties on cities.id_city = properties.id_city
  group by 1