SELECT YearNumber,

MonthNumber,

SUM(Occurances) AS CountOfData

FROM

(select YEAR(DateField) AS YearNumber,

MONTH(DateField) AS MonthNumber,

Count(datacount) As Occurances

FROM

datatable

GROUP BY SQLDate)Dates

GROUP BY YearNumber,

MonthNumber

Order By YearNumber,

MonthNumber

This should give you what you are looking for.