SQL Copied query from MS Access

Question

I am trying to recreate a MS Access query in SQL, the following is the Access query converted to run in SQL

    SELECT Column1
          ,Column2
          ,Column3
          ,Count('x') AS CountX
    FROM [SchmaName].[SQLView]
    WHERE ("SomeWhereStatement")
    GROUP BY Column1, Column2, Column3
    HAVING Count('x')>1;

What I am confused about is the

 ,Count('x') AS CountX

and

 HAVING Count('x')>1;

X does not come from the SQLView that has been created and when I run the above it will return a single record with Columns 1 - 3 being null and column CountX being 12896. I am expecting this return about 4285 records in total and I suspect the reason that I am not is something to do with this Count. Any suggestions as to what this count is actually doing?

Answer 1

When you pass any constant argument in COUNT() (ie 'x' is constant argument), it will return total number of records :

So, with your query it will return the records based on Columns which are defined with GROUP BY clause.

SELECT Column1, Column2, Column3, Count('x') AS CountX
FROM [SchmaName].[SQLView]
WHERE ("SomeWhereStatement")
GROUP BY Column1, Column2, Column3
HAVING Count('x') > 1;