Find the average number of downloads for Single-Tables released by '2Pac' between 2001 and 2013.
2Pac is an artist; releaseType = 'single'; between 2001 and 2013 refers to groupYear between 2001 and 2013; average number of downloads = AVG(totalSnatched);
SELECT AVG(totalSnatched) FROM torrents WHERE artist LIKE '2Pac' AND releaseType LIKE 'Single' AND groupYear BETWEEN 2001 AND 2013
CREATE TABLE IF NOT EXISTS "torrents"
(
    groupName     TEXT,
    totalSnatched INTEGER,
    artist        TEXT,
    groupYear     INTEGER,
    releaseType   TEXT,
    groupId       INTEGER,
    id            INTEGER
        constraint torrents_pk
            primary key
);
CREATE TABLE IF NOT EXISTS "tags"
(
    "index" INTEGER
        constraint tags_pk
            primary key,
    id      INTEGER
        constraint tags_torrents_id_fk
            references torrents,
    tag     TEXT
);
CREATE INDEX ix_tags_index
    on tags ("index");
