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mysql> update t_diff set a='a14', d='d14' where id=4;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0mysql> select * from t_diff;
+----+------+------+------+------+
| id | a | b | c | d |
+----+------+------+------+------+
| 1 | a1 | b1 | c1 | d1 |
| 2 | a2 | b2 | c2 | d2 |
| 3 | a3 | b3 | c3 | d3 |
| 4 | a14 | b4 | c4 | d14 |
+----+------+------+------+------+
4 rows in set (0.00 sec)
mysql> select @@report_host;
+---------------+
| @@report_host |
+---------------+
| 10.0.0.70 |
+---------------+
1 row in set (0.00 sec)
mysql>
