text: CREATE TABLE Exercise (
          id INTEGER PRIMARY KEY AUTOINCREMENT,
          time_stamp TEXT NOT NULL DEFAULT (DATETIME('now', '+9 hours')),
          tweeted_time TEXT NOT NULL,
          kcal INTEGER NOT NULL ,
          user_name TEXT NOT NULL ,
          user_screen_name TEXT NOT NULL ,
          tweet_id NUMERIC NOT NULL UNIQUE ,
          exercise_day TEXT GENERATED ALWAYS AS (date(datetime(tweeted_time,'-4 hours'))) VIRTUAL ,
          exercise_month TEXT GENERATED ALWAYS AS (strftime('%Y-%m', datetime(tweeted_time,'-4 hours'))) VIRTUAL
          );
  
  CREATE INDEX user_screen_name_index ON Exercise(user_screen_name);
  CREATE INDEX exercise_day_index ON Exercise(exercise_day);
  CREATE INDEX exercise_month_index ON Exercise(exercise_month);
  