# Pastebin WnXwEaU1
MariaDB [mysql]> SELECT user, host, password FROM mysql.user;
+-------+-----------+-------------------------------------------+
| user  | host      | password                                  |
+-------+-----------+-------------------------------------------+
| root  | localhost |                                           |
| swati | localhost | *2470C0C06DEE42FD1618BB99005ADCA2EC9D1E19 |
+-------+-----------+-------------------------------------------+
2 rows in set (0.00 sec)

MariaDB [mysql]> update user set password="" where user ="swati";
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

MariaDB [mysql]> SELECT user, host, password FROM mysql.user;
+-------+-----------+----------+
| user  | host      | password |
+-------+-----------+----------+
| root  | localhost |          |
| swati | localhost |          |
+-------+-----------+----------+
2 rows in set (0.00 sec)