### Database Schema:
CREATE TABLE user_reviews (
	App	TEXT	NULL,
	Translated_Review	TEXT	NULL,
	Sentiment	TEXT	NULL,
	Sentiment_Polarity	TEXT	NULL,
	Sentiment_Subjectivity	TEXT	NULL,
	foreign key (App) references playstore (App)
);

CREATE TABLE playstore (
	App	TEXT	NULL,
	Category	TEXT	NULL,
	Rating	REAL	NULL,
	Reviews	INTEGER	NULL,
	Size	TEXT	NULL,
	Installs	TEXT	NULL,
	Type	TEXT	NULL,
	Price	TEXT	NULL,
	`Content Rating`	TEXT	NULL,
	Genres	TEXT	NULL
);

### User's Query:
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.

### Extra Knowledge:
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'