[[PSSdev/WebDB]] #contents * 概要 - Web 上にも DB を設置 - ユーザがある程度自由に編集できるDBとする - ユーザによる問題 - 各ユーザの学習状況(履歴)を反映したDB - WebDB は PostgreSQL を用いる. * メモ ** 集計クエリー 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 * 問題テーブル ** question 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 ); * 履歴テーブル ** user_info CREATE TABLE user_info ( uid INTEGER PRIMARY KEY, name TEXT NOT NULL UNIQUE ); ** question_log 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) );