select q.qid, q.question, sum(l.nc) as snc, sum(l.ni) as sni from question as q LEFT JOIN question_log as l on q.qid=l.qid where q.level>320 group by q.qid, q.question limit 10
CREATE TABLE question ( qid INTEGER PRIMARY KEY, question TEXT NOT NULL, answer TEXT NOT NULL UNIQUE, hint TEXT NOT NULL, description TEXT NOT NULL, pronounce TEXT NOT NULL, mode INTEGER NOT NULL, ctime timestamp default 'now', utime timestamp default 'now', level INTEGER NOT NULL );
CREATE TABLE user_info ( uid INTEGER PRIMARY KEY, name TEXT NOT NULL UNIQUE );
nc/ni は nc1/ni1 に相当.
CREATE TABLE question_log ( qid INTEGER NOT NULL REFERENCES question(qid), uid INTEGER NOT NULL REFERENCES user_info(uid), mid INTEGER NOT NULL, nc INTEGER NOT NULL, ni INTEGER NOT NULL, PRIMARY KEY(qid,uid,mid) );