If you try to import a large MySQL database in your server, then a Maximum execution time of 300 seconds exceeded may occur. To override this do the following:
Left click wampmanager icon in the system tray -> MySQL -> MySQL Console
Enter the ‘root’ password which is nothing ( just press enter key ) unless you changed it.
Select the database you want to reload like this
Then load the dump file like this
You can alternatively use bigdump as explained here.