sql query with fieldName as variable name

[info at vallemediatime.com]

I've found my stupid error:
the really code that I have in my movie is:

query = "SELECT RecID, * FROM Students\
WHERE " && gSearchField && " = '" & searchString & "'"

and finally I've see that the my mistake is at the end of first line (I
forget the space after students!)

Thanks to Peter for very useful help.
Paolo