Question

I have a CustomerData table with the following attributes:
FirstName, LastName, DateofBirth, ID, Location

I am trying to write a query that pulls the first name, last name, date of birth, and IDNumber of users who belong to more than one location.

I tried the following code but I am getting an error about aggregates needing a group by clause.

SELECT *
FROM CustomerData
WHERE Count(Location) > 2

Any assistance would be greatly appreciated

Answer 1

Use HAVING:

SELECT FirstName, LastName, DateofBirth, ID, Count(Location)
FROM CustomerData
GROUP BY FirstName, LastName, DateofBirth, ID
HAVING Count(Location) > 2

HAVING is basically a WHERE that allows you to use aggregate functions.