问题及解答

mysql> use information_schema;

mysql> select * from processlist;
+-----+------+-----------------+--------------------+---------+------+-----------+---------------------------+
| ID  | USER | HOST            | DB                 | COMMAND | TIME | STATE     | INFO                      |
+-----+------+-----------------+--------------------+---------+------+-----------+---------------------------+
| 116 | root | localhost:56779 | information_schema | Query   |    0 | executing | select * from processlist |
+-----+------+-----------------+--------------------+---------+------+-----------+---------------------------+
1 row in set (0.00 sec)