Combining 2 Sql Strings

I have 2 SQL strings:

SELECT *
FROM NK_editie " & MM_whereConst & " " & whereClause & "
ORDER BY editie desc

And

SELECT *
FROM NK_editie INNER JOIN NK_edities ON NK_editie.editieid = NK_edities.ID
ORDER BY editie desc

Now I want to combine those 2 to one string.

I have problems to set it up in working order.
My tryout:
SELECT *
FROM NK_editie INNER JOIN NK_edities ON NK_editie.editieid = NK_edities.ID &
" & MM_whereConst & " " & whereClause & "
ORDER BY editie desc

It shows al the records which are joined, only the second string " & MM_whereConst & " " & whereClause & " is not working.