mysql in cmd :some databases isn't shows up, even i log from the user "root",

Is this result came if you log like this?

• in cmd: mysql
  or
• in cmd: mysql -u root

Then log in to root user like this: "mysql -u root -p" press enter,
Then it will ask the password leave it blank (it you aren't set any password) and press enter
Then type "show databases" command to show all the databases
Hope this work!!