How can I do this in SQL/phpmyadmin?

Question

I made tables:

books - with columns ID_Books and Name_Books

authors - ID_Authors and Name_Author

product - ID and Author and Book

I need it to put in product if ID_Books and ID_Authors is same then put that id into ID and in Author put Name_Author with corresponding id and in Book put Name_Books with corresponding id

Answer 1

If I got your question right, you can perform a join and add that result into the third table.

INSERT INTO PRODUCT(ID,Author,Book) 
SELECT Id_Author, Name_Author, Name_Books 
FROM AUTHOR INNER JOIN BOOKS ON Id_Author = Id_Books;