Mode:
Duration:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
CREATE TABLE authors (
author_id SERIAL PRIMARY KEY,
author_name VARCHAR(100) NOT NULL
);
CREATE TABLE publishers (
publisher_id SERIAL PRIMARY KEY,
publisher_name VARCHAR(100) NOT NULL
);
CREATE TABLE books (
book_id SERIAL PRIMARY KEY,
title VARCHAR(200) NOT NULL,
author_id INTEGER REFERENCES authors(author_id),
publisher_id INTEGER REFERENCES publishers(publisher_id),
publication_year INTEGER
);
INSERT INTO authors (author_name) VALUES
('Robert Martin'),
('Martin Fowler');
INSERT INTO publishers (publisher_name) VALUES
('Prentice Hall'),
('Addison-Wesley');
INSERT INTO books (
title,
author_id,
publisher_id,
publication_year
) VALUES
('Clean Code', 1, 1, 2008),
('Refactoring', 2, 2, 1999);
SELECT
b.title,
a.author_name,
p.publisher_name,
b.publication_year
FROM books b
JOIN authors a
ON b.author_id = a.author_id
JOIN publishers p
ON b.publisher_id = p.publisher_id
ORDER BY b.publication_year DESC;Coding works best on desktop or with an external keyboard.
~`
!1
@2
#3
$4
%5
^6
&7
*8
(9
)0
_-
+=
⌫
Tab
Q
W
E
R
T
Y
U
I
O
P
{[
}]
|\
Caps
A
S
D
F
G
H
J
K
L
:;
"'
↵
⇧
Z
X
C
V
B
N
M
<,
>.
?/
⇧
Ctrl
⊞
Alt
␣
Alt
⊞
Ctx
Ctrl
👈Middle
CL Pinky
L Ring
L Middle
L Index
Thumb
R Index
R Middle
R Ring
R Pinky