Question

This is my query:

SELECT COUNT(*) AS Expr1, name, appointment_date 
FROM ReportingTable 
GROUP BY name, appointment_date

I want to group the appointment_date column by month as follows:

SELECT COUNT(*) AS Expr1, name, appointment_date
FROM ReportingTable
GROUP BY name, MONTH(appointment_date)

But my query raises the following error:

Column “appointment_date” is invalid in the selected list because it
is not contained in either aggregate function or groupby clause .

Answer 1

Would this work:

SELECT        COUNT(*) AS Expr1, name, MONTH(appointment_date) AS appointment_month
FROM            ReportingTable
GROUP BY name, appointment_month