-- Database schema
| playstore : App [ TEXT ] , Category [ TEXT ] , Rating [ REAL ] , Reviews [ INTEGER ] , Size [ TEXT ] , Installs [ TEXT ] , Type [ TEXT ] , Price [ TEXT ] , Content Rating [ TEXT ] , Genres [ TEXT ] | user_reviews : App [ TEXT ] user_reviews.App = playstore.App , Translated_Review [ TEXT ] , Sentiment [ TEXT ] , Sentiment_Polarity [ TEXT ] , Sentiment_Subjectivity [ TEXT ] |
-- -- 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.

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';