1. obclient> DELETE FROM t1 WHERE c1 = 2;
    2. Query OK, 1 row affected (0.02 sec)
    3. obclient> SELECT * FROM t1;
    4. +----+------+
    5. | c1 | c2   |
    7. |  3 |    3 |
    8. |  4 |    4 |
    9. 3 rows in set (0.01 sec)