Arduino Yún as data Logger

How Arduino Yun can be used to store Sensor data to MYSQL on any external server? Like a network of arduino's all logging the sensor data to common DB.

Hello,
you can use a python script executed from the sketch with the Process class provided by the Bridge library.
Here are some helpful topics:

http://forum.arduino.cc/index.php?topic=273008.0

http://forum.arduino.cc/index.php?topic=239575.0