Question

Hi i need a query help (and yes i have been trying to search but could not find something that helped me)

I have two tables:

Customer

• CustomerID
• CountryID

Country

• CountryID
• Country

How I would like to write a query to have result as following:

CountryID, Country, NumberOfOccurancesOfThisCountryInTheCustomerTable

Help would really be appreciated!

Answer 1

Try this:

SELECT CountryID, Country,
  COUNT(Customer.CustomerID) AS NumberOfOccurancesOfThisCountryInTheCustomerTable
FROM Country LEFT JOIN
     Customer ON Country.CountryID = Customer.CountryID
GROUP BY Country.CountryID, Country.Country

EDIT: Using LEFT JOIN vs. INNER JOIN to include Country records that have zero Customer records (thanks Mark Bannister).