You can create database backup by typing following commands from command line.
Go to run dialog by pressing Window + R keys at the same time.
Type following command and press Enter key.
mysqldump -u <database username> -p <database name> > database_backup_file_name.sql
This command will ask you to enter database password. Enter password and press Enter key.
Your database backup will be saved in your current directory with database_backup_file_name.sql name.