Let\'s assume the following:
Table A
id | value ---------- 1 | red 2 | orange 5 | yellow 10 | green 11 | blue 12 | indigo 20 | violet
create table B (id int) insert into B values (10),(11),(12),(13),(14) select * from B left join A on A.id=B.id where A.id is null drop table B
http://sqlfiddle.com/#!6/6666c1/30