Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

OP done #1

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open

OP done #1

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
185 changes: 177 additions & 8 deletions queries.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,31 +7,113 @@
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, authors.name
FROM books
INNER JOIN authors
ON books.author_id = authors.id;
title | name
-----------------------------------------+-----------------
Harry Potter and the Chamber of Secrets | J.K. Rowling
Harry Potter and the Goblet of Fire | J.K. Rowling
1984 | George Orwell
Animal Farm | George Orwell
Adventures of Huckleberry Finn | Mark Twain
The Adventures of Tom Sawyer | Mark Twain
Murder on the Orient Express | Agatha Christie
The Shining | Stephen King
Oliver Twist | Charles Dickens
War and Peace | Leo Tolstoy
To Kill a Mockingbird | Harper Lee
(11 rows)


```

<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, books.title
FROM authors
LEFT JOIN books
ON authors.id = books.author_id;
name | title
---------------------+-----------------------------------------
J.K. Rowling | Harry Potter and the Chamber of Secrets
J.K. Rowling | Harry Potter and the Goblet of Fire
George Orwell | 1984
George Orwell | Animal Farm
Mark Twain | Adventures of Huckleberry Finn
Mark Twain | The Adventures of Tom Sawyer
Agatha Christie | Murder on the Orient Express
Stephen King | The Shining
Charles Dickens | Oliver Twist
Leo Tolstoy | War and Peace
Harper Lee | To Kill a Mockingbird
Virginia Woolf |
F. Scott Fitzgerald |
(13 rows)


```

<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 books.title, authors.name
FROM books
RIGHT JOIN authors
ON books.author_id = authors.id;
title | name
-----------------------------------------+---------------------
Harry Potter and the Chamber of Secrets | J.K. Rowling
Harry Potter and the Goblet of Fire | J.K. Rowling
1984 | George Orwell
Animal Farm | George Orwell
Adventures of Huckleberry Finn | Mark Twain
The Adventures of Tom Sawyer | Mark Twain
Murder on the Orient Express | Agatha Christie
The Shining | Stephen King
Oliver Twist | Charles Dickens
War and Peace | Leo Tolstoy
To Kill a Mockingbird | Harper Lee
| Virginia Woolf
| F. Scott Fitzgerald
(13 rows)


```

<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 books.title, authors.name
FROM books
FULL JOIN authors
ON books.author_id = authors.id;
title | name
-----------------------------------------+---------------------
Harry Potter and the Chamber of Secrets | J.K. Rowling
Harry Potter and the Goblet of Fire | J.K. Rowling
1984 | George Orwell
Animal Farm | George Orwell
Adventures of Huckleberry Finn | Mark Twain
The Adventures of Tom Sawyer | Mark Twain
Murder on the Orient Express | Agatha Christie
The Shining | Stephen King
Oliver Twist | Charles Dickens
War and Peace | Leo Tolstoy
To Kill a Mockingbird | Harper Lee
| Virginia Woolf
| F. Scott Fitzgerald
(13 rows)


```

<br>
Expand All @@ -41,31 +123,118 @@
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, publishers.name, publishers.location
FROM books
INNER JOIN publishers
ON books.publisher_id = publishers.id;
title | name | location
-----------------------------------------+----------------------+----------
Harry Potter and the Chamber of Secrets | Bloomsbury | London
Harry Potter and the Goblet of Fire | Bloomsbury | London
1984 | Secker & Warburg | London
Animal Farm | Secker & Warburg | London
Adventures of Huckleberry Finn | Chatto & Windus | London
The Adventures of Tom Sawyer | Chatto & Windus | London
Murder on the Orient Express | Penguin Books | London
The Shining | HarperCollins | New York
Oliver Twist | Simon & Schuster | New York
War and Peace | Random House | New York
To Kill a Mockingbird | Macmillan Publishers | London
(11 rows)


```

<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, books.title
FROM publishers
LEFT JOIN books
ON publishers.id = books.publisher_id;
name | title
----------------------+-----------------------------------------
Bloomsbury | Harry Potter and the Chamber of Secrets
Bloomsbury | Harry Potter and the Goblet of Fire
Secker & Warburg | 1984
Secker & Warburg | Animal Farm
Chatto & Windus | Adventures of Huckleberry Finn
Chatto & Windus | The Adventures of Tom Sawyer
Penguin Books | Murder on the Orient Express
HarperCollins | The Shining
Simon & Schuster | Oliver Twist
Random House | War and Peace
Macmillan Publishers | To Kill a Mockingbird
Hachette Book Group |
Scholastic Inc. |
(13 rows)


```

<br>

3. Using a **RIGHT JOIN**, list all books (right table) and their corresponding publishers on the (left table). The result should include all books, even those without a linked publisher.

```sql
-- Your Query Goes Here
SELECT books.title, publishers.name
FROM books
RIGHT JOIN publishers
ON books.publisher_id = publishers.id;
title | name
-----------------------------------------+----------------------
Harry Potter and the Chamber of Secrets | Bloomsbury
Harry Potter and the Goblet of Fire | Bloomsbury
1984 | Secker & Warburg
Animal Farm | Secker & Warburg
Adventures of Huckleberry Finn | Chatto & Windus
The Adventures of Tom Sawyer | Chatto & Windus
Murder on the Orient Express | Penguin Books
The Shining | HarperCollins
Oliver Twist | Simon & Schuster
War and Peace | Random House
To Kill a Mockingbird | Macmillan Publishers
| Hachette Book Group
| Scholastic Inc.
(13 rows)



```

<br>

4. Using a **FULL JOIN**, list all records from the `authors`, `books`, and `publishers` tables. The result should include all records from the three tables, even if there are no matches between them.

```sql
-- Your Query Goes Here
SELECT books.title, authors.name AS author, publishers.name AS publisher
FROM books
FULL JOIN authors
ON books.author_id = authors.id
FULL JOIN publishers
ON books.publisher_id = publishers.id;
title | author | publisher
-----------------------------------------+---------------------+----------------------
Harry Potter and the Chamber of Secrets | J.K. Rowling | Bloomsbury
Harry Potter and the Goblet of Fire | J.K. Rowling | Bloomsbury
1984 | George Orwell | Secker & Warburg
Animal Farm | George Orwell | Secker & Warburg
Adventures of Huckleberry Finn | Mark Twain | Chatto & Windus
The Adventures of Tom Sawyer | Mark Twain | Chatto & Windus
Murder on the Orient Express | Agatha Christie | Penguin Books
The Shining | Stephen King | HarperCollins
Oliver Twist | Charles Dickens | Simon & Schuster
War and Peace | Leo Tolstoy | Random House
To Kill a Mockingbird | Harper Lee | Macmillan Publishers
| Virginia Woolf |
| F. Scott Fitzgerald |
| | Hachette Book Group
| | Scholastic Inc.
(15 rows)


```

<br>