Compare two tables and update one table in Oracle-sql

Question

I have two tables in oracle database 'test_DB' as tmp_book and author as follows

tmp_book table has a smaller set. I need to compare these 2 tables as follows: get the first 'book_id' in tmp_book table and in author search for that 'book_id' and update column 'is_available_image_url' with value 'Y'.

This way I need to do this for all the records in the tmp_book table

Please help me with this.

Answer 1

This is an update with some filtering:

update author
    set is_available_image = 'Y'
    where exists (select 1 from tmp_book b where b.book_id = author.book_id);