How to copy a table field as a new table record

New Tutorial: how to copy A table field as A new table record now has table A & nbsp; and table BA structure id & nbsp; username & nbsp; genre & nbsp; pattern1 & nbsp; & nbsp; mr. a & nbsp; new tutorial: How to copy table fields to become records of new tables
Currently, tables A and B are available.

A structure

Id username genre pattern
1 mr. a 0 sales
2 mr. B 1 manager
3 mr. c 0 sales

B structure

Id model field name setting css
1 12 area

Now I want to copy the table field to the B table record,

The structure is as follows:
Id model field name setting css
1 12 area
2 15 username
3 15 genre gender
4 15. pattern position

I did not translate the manual. I am a beginner.
------ Solution --------------------
What is the relationship between the two edges? how can we combine the two edges simply.