wd and cc

来自这里 http://forum.moztw.org/viewtopic.php?t=26802
使用前先备份，后悔了还能弄回去。

sqlite3 places.sqlite "DELETE FROM moz_historyvisits WHERE place_id IN (SELECT id FROM moz_places WHERE visit_count <=2 );"

sqlite3 places.sqlite "DELETE FROM moz_places WHERE (visit_count <=2 AND hidden <> 1 AND id NOT IN (SELECT place_id FROM moz_annos UNION SELECT fk FROM moz_bookmarks));"

sqlite3 places.sqlite "DELETE FROM moz_inputhistory WHERE place_id NOT IN (SELECT id FROM moz_places);"

sqlite3 places.sqlite "DELETE FROM moz_favicons WHERE id NOT IN (SELECT
favicon_id FROM moz_places);"

sqlite3 places.sqlite "VACUUM;"