INSERT INTO ALONE_APP_VERSION VALUES ('v1.0.0',  now(), 'USERNAME');
ALTER TABLE WTS_CARD ADD INDEX USER_PAPER_CARD (PAPERID,USERID,ROOMID);
ALTER TABLE wts_card_answer ADD INDEX USER_ANSWER (CARDID,VERSIONID,ANSWERID);
ALTER TABLE wts_card_answer ADD INDEX USER_SUBVERSION (CARDID,VERSIONID);