How many apps were last updated in January of 2018? Please write one translated review with positive sentiment for each app, if there's any.
updated in January of 2018 refers to Last Updated BETWEEN 'January 1, 2018' and 'January 31, 2018';
SELECT DISTINCT Translated_Review FROM user_reviews WHERE App IN ( SELECT App FROM playstore WHERE `Last Updated` BETWEEN 'January 1, 2018' AND 'January 31, 2018' ) AND Sentiment = 'Positive'
CREATE TABLE IF NOT EXISTS "playstore"
(
    App              TEXT,
    Category         TEXT,
    Rating           REAL,
    Reviews          INTEGER,
    Size             TEXT,
    Installs         TEXT,
    Type             TEXT,
    Price            TEXT,
    "Content Rating" TEXT,
    Genres           TEXT
);
CREATE TABLE IF NOT EXISTS "user_reviews"
(
    App                    TEXT
        references "playstore" (App),
    Translated_Review      TEXT,
    Sentiment              TEXT,
    Sentiment_Polarity     TEXT,
    Sentiment_Subjectivity TEXT
);
