• -- Collect the matches

    SELECT l.ID ;

    FROM LARGE l ;

    INNER JOIN small s ;

    ON s.ID <> l.ID ;

    AND LARGE.Z5 = small.z5 and Large.ln = small.ln and Large.fn = small.fn ;

    INTO TABLE SuppressedRows.DBF ;

    -- Then use the ID's to restrict table LARGE

    SELECT l.ID ;

    FROM LARGE l ;

    WHERE l.ID NOT IN (SELECT ID FROM SuppressedRows) ;

    INTO TABLE SuppressedRows.DBF ;

    -- You might be able to do this in one step (it's a while since I've used Foxpro SQL)

    SELECT l.ID ;

    FROM LARGE l ;

    WHERE l.ID NOT IN ( ;

    SELECT l.ID ;

    FROM LARGE l ;

    INNER JOIN small s ;

    ON s.ID <> l.ID ;

    AND LARGE.Z5 = small.z5 and Large.ln = small.ln and Large.fn = small.fn) ;

    INTO TABLE SuppressedRows.DBF ;

    “Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

    For fast, accurate and documented assistance in answering your questions, please read this article.
    Understanding and using APPLY, (I) and (II) Paul White
    Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden