attach database "verycd.sqlite3.db" as verycd;
attach database "comment.sqlite3.db" as comment;
attach database "lock.sqlite3.db" as lock;
replace into verycd.verycd select * from verycd;
replace into comment.comment select * from comment;
replace into lock.lock select * from lock;
delete from verycd.verycd where updtime<"1971";
delete from verycd.verycd where updtime>"2040";