Merging two sets of data

Dear all,

I have a problem that has been frustrating me for a long time.
I have a series of data as follow:

Name | Age | ***
John | 13 | M
Mary | 18 | F
Peter | 10 |M

Then I have another set of data as follow:

Name | Height | BMI
Peter | 120cm | 25
John | 125cm | 30
Mary | 150cm | 25

If I want to merge them, say

Name | Age | *** | Height | BMI
John | 13 | M | 125cm | 30
Mary | 18 | F | 150cm | 25
Peter | 10 |M | 120cm |25

What should I do in order to merge them in the quickest way?
Thanks everyone !!