Generate new attributes depended on ID
Example of my data are presented below. This is set of many books. First column is ID of a book. Now, there are 100 tags_name to each book. What I would like to obtain is table:
book_id | rating | aurhor | titile | userid | tag_name1 |tag_name2|....|tag_name100|
So have the row which contains all tag_names for one book.
Could you please help me?