SQL> create table mje(mac varchar(10), comment varchar(10));
SQLRowCount returns -1
SQL> insert into mje values('1226', 'comment1');
SQLRowCount returns 1
SQL> insert into mje values('1226', 'comment2');
SQLRowCount returns 1
SQL> insert into mje values('1226', 'comment3');
SQLRowCount returns 1
SQL> select * from mje;
+-----------+-----------+
| mac       | comment   |
+-----------+-----------+
| 1226      | comment1  |
| 1226      | comment2  |
| 1226      | comment3  |
+-----------+-----------+
SQLRowCount returns -1
3 rows fetched
SQL>