mysql> select * from MR2 limit 10;
+-----------+--------+
| MR_M      | MR_R   |
+-----------+--------+
| M13470333 | RL2591 |
| M13470334 | RL2590 |
| M13470335 | RL2588 |
| M13470339 | RL4708 |
| M13470341 | RL2584 |
| M13470342 | RL2583 |
| M57165208 | RL2582 |
| M13470344 | RL2580 |
| M13470345 | RL2579 |
| M13470346 | RL2578 |
+-----------+--------+
10 rows in set (0.00 sec)