Draw a path between multiple points with help of Database

Follow below links that may help you:

 

http://www.aspsnippets.com/Articles/Google-Maps-V3-Draw-route-line-between-two-geographic-locations-Coordinates-Latitude-and-Longitude-points.aspx

 

http://stackoverflow.com/questions/13433648/draw-a-line-between-two-point-on-a-google-map-using-jquery 

 

https://developers.google.com/maps/documentation/javascript/examples/polyline-simple