Question

I have two tables in a database.

First table is books having fields number,*title*,subject area, author.
Other table is borrowed_items having fields *item_number* , *user_id* , issue date and return date .

How to carry out query to find book title whose subject area is ‘Physics’ and are borrowed i.e. exist in borrowed items table ?

The ‘item_number’ field in borrowed_items table corresponds to ‘number’ field in ‘books’ table.

Answer 1

SELECT  a.*, b.*       -- you can select your desired columns here
FROM    books a
        INNER JOIN borrowed_items b
            ON a.`number` = b.item_number
WHERE   a.`subject area` = 'Physics'

To further learn more about joins, please visit the link below:

• Visual Representation of SQL Joins