Importing larger sql files into MySQL
Since you state (in a clarification comment to another person's answer) that you are using MySQL Workbench, you could try using the "sql script" option there. This will avoid the need to use the commandline (although I agree with the other answer that it's good to climb up on that horse and learn to ride).
In MySQL Workbench, go to File menu, then select "open script". This is probably going to take a long time and might even crash the app since it's not made to open things that are as big as what you describe.
The better way is to use the commandline. Make sure you have MySQL client installed on your machine. This means the actual MySQL (not Workbench GUI or PhpMyAdmin or anything like that). Here is a link describing the command-line tool. Once you have that downloaded and installed, open a terminal window on your machine, and you have two choices for slurping data from your file system (such as in a backup file) up into your target database. One is to use 'source' command and the other is to use the < redirection operator.
Option 1: from the directory where your backup file is:
$mysql -u username -p -h hostname databasename < backupfile.sql
Option 2: from the directory where your backup file is:
$mysql -u username -p -h hostname
[enter your password]
> use databasename;
> source backupfile.sql
Obviously, both of these options require that you have a backup file that is SQL.
You can import large files this command line way:
mysql -h yourhostname -u username -p databasename < yoursqlfile.sql