Help me please~~!

well, my WP was okay earlier but when I check it out today this message appeared

WordPress database error: [Can’t create/write to file ‘/tmp/#sql_1eb2_0.MYD’ (Errcode: 17)]
SELECT DISTINCT * FROM wp_posts WHERE 1=1 AND post_date_gmt <= ‘2005-11-03 17:28:59’ AND (post_status = “publish” OR post_author = 1 AND post_status != ‘draft’ AND post_status != ‘static’) GROUP BY wp_posts.ID ORDER BY post_date DESC LIMIT 0, 3

and that

Sorry, no posts matched your criteria.

what is this..? o.O can someone help me fix this? please…