SELECT * MyTable WHERE uid=’Медиф′;
..2
SELECT *  FROM MyaART WHERE yearArt > 2010;
..3
SELECT id_tovar,kilkist,name, author
FROM
(
  SELECT TOP 3 id_tovar, SUM(kilkist) AS kilkist
  FROM MyaART
  GROUP BY id_tovar
  ORDER BY SUM(kilkist) DESC
) ss
ORDER BY kilkist