Question : SQL Join Group and SUM

Got two tables  Category  and Product_Table  

Category table has the following Fields:

CatID
MainCAT
SubCat

Product_Table has
PN
ClearanceID

The ClearanceID is populated with the CatID from the Category table


What I am trying to do is make a record set that Lists the CategoryID, MainCat and SubCat with a COUNT of how many products in the Product_Table have matching ClearanceID

So the record set would look something like this

CategoryID, MainCat ,SubCat , TheCount

123       Boat       Sail       23
124       Boat       Motor    4
125       Car         Sport    3
126       Car         Van      34

But I do not want any records returned where there are no products from the product table

Answer : SQL Join Group and SUM

SELECT
    CategoryID,
    MainCat,
    SubCat,
    COUNT(*) TheCount
FROM Category c
INNER JOIN Product_Table p
    ON c.CatID = p.ClearanceID
GROUP BY
    CategoryID,
    MainCat,
    SubCat
ORDER BY CategoryID