How to get the first day of the current month in MySQL?

With the help of following MySQL query, we can get the first day of the current month −

mysql> SELECT DATE_SUB(LAST_DAY(NOW()),INTERVAL DAY(LAST_DAY(NOW()))-
1 DAY) AS 'FIRST DAY OF CURRENT MONTH';
+----------------------------+
| FIRST DAY OF CURRENT MONTH |
+----------------------------+
| 2017-10-01                 |
+----------------------------+
1 row in set (0.00 sec)