done

queries.md

@@ -7,31 +7,60 @@
 1. Using an **INNER JOIN**, list all books (left table) that have an assigned author (right table). The result should include only books with assigned authors.
 
 ```sql
--- Your Query Goes Here
+SELECT
+    books.title AS book_title,
+    authors.name AS author_name,
+    authors.nationality AS author_nationality,
+    books.publish_date
+FROM books
+INNER JOIN authors
+    ON books.author_id = authors.id
+WHERE books.author_id IS NOT NULL;
 ```
 
 <br>
 
 2. Using a **LEFT JOIN**, list all authors (left table) and their corresponding books on the (right table). The result should include all authors, including those who don't have any books assigned.
 
 ```sql
--- Your Query Goes Here
+SELECT
+    authors.name AS author_name,
+    authors.nationality AS author_nationality,
+    books.title AS book_title,
+    books.publish_date
+FROM authors
+LEFT JOIN books
+    ON authors.id = books.author_id;
 ```
 
 <br>
 
 3. Using a **RIGHT JOIN**, list all books (right table) and their corresponding authors on the (left table). The result should include books without assigned authors.
 
 ```sql
--- Your Query Goes Here
+SELECT
+    authors.name AS author_name,
+    authors.nationality AS author_nationality,
+    books.title AS book_title,
+    books.publish_date
+FROM authors
+RIGHT JOIN books
+    ON authors.id = books.author_id;
 ```
 
 <br>
 
 4. Using a **FULL JOIN**, list all records from the `books` and `authors` tables. The result should include all details from both tables, even if there are no match.
 
 ```sql
--- Your Query Goes Here
+SELECT
+    authors.name AS author_name,
+    authors.nationality AS author_nationality,
+    books.title AS book_title,
+    books.publish_date
+FROM authors
+FULL JOIN books
+    ON authors.id = books.author_id;
 ```
 
 <br>
@@ -41,15 +70,27 @@
 1. Using an **INNER JOIN**, list all books (left table) and their corresponding publishers on the (right table). The result should include the book's title, publisher's name, and location.
 
 ```sql
--- Your Query Goes Here
+SELECT
+    books.title AS book_title,
+    publishers.name AS publisher_name,
+    publishers.location AS publisher_location
+FROM books
+INNER JOIN publishers
+    ON books.publisher_id = publishers.id;
 ```
 
 <br>
 
 2. Using a **LEFT JOIN**, list all publishers (left table) and any books they have published on the (right table). The result should include all publishers, including those who haven't published any books.
 
 ```sql
--- Your Query Goes Here
+SELECT
+    publishers.name AS publisher_name,
+    publishers.location AS publisher_location,
+    books.title AS book_title
+FROM publishers
+LEFT JOIN books
+    ON publishers.id = books.publisher_id;
 ```
 
 <br>