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Christian Paez

Software and Data Science

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The Ultimate SQL JOIN Cheat Sheet

The Ultimate SQL JOIN Cheat Sheet

2
Comments
4 min read

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HackerRank SQL Preparation: Weather Observation Station 3(MySQL)

HackerRank SQL Preparation: Weather Observation Station 3(MySQL)

2
Comments
1 min read
HackerRank SQL Preparation: Weather Observation Station 1(MySQL)

HackerRank SQL Preparation: Weather Observation Station 1(MySQL)

2
Comments
1 min read
HackerRank SQL Preparation: Japanese Cities' Names(MySQL)

HackerRank SQL Preparation: Japanese Cities' Names(MySQL)

3
Comments
1 min read
HackerRank SQL Preparation: Japanese Cities' Attributes(MySQL)

HackerRank SQL Preparation: Japanese Cities' Attributes(MySQL)

4
Comments
1 min read
HackerRank SQL Preparation: Select by ID(MySQL)

HackerRank SQL Preparation: Select by ID(MySQL)

3
Comments
1 min read
HackerRank SQL Preparation: Select All(MySQL)

HackerRank SQL Preparation: Select All(MySQL)

2
Comments
1 min read
Automate binary execution at Startup with BASH

Automate binary execution at Startup with BASH

1
Comments
1 min read
Simplifying PATH Management with Bash

Simplifying PATH Management with Bash

3
Comments
2 min read
Automating Video editing with programming knowledge

Automating Video editing with programming knowledge

1
Comments
2 min read
HackerRank SQL preparation; Revising the Select Query II(MySQL)

HackerRank SQL preparation; Revising the Select Query II(MySQL)

1
Comments
1 min read
HackerRank SQL Preparation: Revising the Select Query I(MySQL)

HackerRank SQL Preparation: Revising the Select Query I(MySQL)

3
Comments
1 min read
The Ultimate SQL SELECT Cheat Sheet

The Ultimate SQL SELECT Cheat Sheet

4
Comments
3 min read
Bandit Level 23 Level 24

Bandit Level 23 Level 24

6
Comments
1 min read
Bandit Level 22 Level 23

Bandit Level 22 Level 23

1
Comments
1 min read
Bandit Level 21 Level 22

Bandit Level 21 Level 22

1
Comments
1 min read
Bandit Level 20 Level 21

Bandit Level 20 Level 21

2
Comments
1 min read
Bandit Level 19 Level 20

Bandit Level 19 Level 20

2
Comments
1 min read
Bandit Level 18 Level 19

Bandit Level 18 Level 19

Comments
1 min read
Bandit Level 17 Level 18

Bandit Level 17 Level 18

2
Comments
2 min read
Bandit Level 16 Level 17

Bandit Level 16 Level 17

1
Comments
2 min read
Unleashing Git Aliases: A Guide to Boosting Linux Productivity

Unleashing Git Aliases: A Guide to Boosting Linux Productivity

2
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3 min read
Bandit Level 15 Level 16

Bandit Level 15 Level 16

2
Comments
1 min read
Bandit Level 14 Level 15

Bandit Level 14 Level 15

Comments
1 min read
Bandit Level 13 Level 14

Bandit Level 13 Level 14

1
Comments
1 min read
Bandit Level 12 Level 13

Bandit Level 12 Level 13

4
Comments
2 min read
Bandit Level 11 Level 12

Bandit Level 11 Level 12

1
Comments
1 min read
Unlocking Productivity and Linux Knowledge with Bash Aliases

Unlocking Productivity and Linux Knowledge with Bash Aliases

1
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3 min read
Bandit Level 10 Level 11

Bandit Level 10 Level 11

1
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1 min read
Bandit Level 9 Level 10

Bandit Level 9 Level 10

2
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2 min read
Bandit Level 8 Level 9

Bandit Level 8 Level 9

2
Comments
1 min read
Bandit Level 7 Level 8

Bandit Level 7 Level 8

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1 min read
Bandit Level 6 Level 7

Bandit Level 6 Level 7

1
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1 min read
Bandit Level 5 Level 6

Bandit Level 5 Level 6

2
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2 min read
Bandit Level 4 Level 5

Bandit Level 4 Level 5

1
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2 min read
Bandit Level 3 Level 4

Bandit Level 3 Level 4

2
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1 min read
Bandit Level 2 Level 3

Bandit Level 2 Level 3

1
Comments
1 min read
Bandit Level 1 Level 2

Bandit Level 1 Level 2

1
Comments
1 min read
Bandit Level 0 Level 1

Bandit Level 0 Level 1

2
Comments
1 min read
Bandit Level 0

Bandit Level 0

2
Comments
1 min read
Portswigger’s lab write up: CORS vulnerability with trusted null origin

Portswigger’s lab write up: CORS vulnerability with trusted null origin

5
Comments
2 min read
Portswigger’s lab write up: CORS vulnerability with basic origin reflection

Portswigger’s lab write up: CORS vulnerability with basic origin reflection

6
Comments
2 min read
Portswigger’s lab write up: Clickjacking with a frame buster script

Portswigger’s lab write up: Clickjacking with a frame buster script

4
Comments
2 min read
Who will win the 2022 Brazilian Presidential Election?, according to statistics.

Who will win the 2022 Brazilian Presidential Election?, according to statistics.

4
Comments
1 min read
Portswigger’s lab write up: Clickjacking with form input data prefilled from a URL parameter

Portswigger’s lab write up: Clickjacking with form input data prefilled from a URL parameter

5
Comments
2 min read
Portswigger’s lab write up: Basic clickjacking with CSRF token protection

Portswigger’s lab write up: Basic clickjacking with CSRF token protection

2
Comments
2 min read
Portswigger’s lab write up: CSRF vulnerability with no defenses

Portswigger’s lab write up: CSRF vulnerability with no defenses

7
Comments
2 min read
¿Cómo funcionan la decodificación y la codificación de las URL?

¿Cómo funcionan la decodificación y la codificación de las URL?

3
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2 min read
How does URL decoding and encoding work?

How does URL decoding and encoding work?

9
Comments
2 min read
¿Por qué es importante normalizar los conjuntos de datos?

¿Por qué es importante normalizar los conjuntos de datos?

5
Comments 2
2 min read
Why is it important to standardize datasets?

Why is it important to standardize datasets?

13
Comments
2 min read
Web 1.0 vs 2.0 vs 3.0.

Web 1.0 vs 2.0 vs 3.0.

7
Comments
2 min read
Web 1.0 vs 2.0 vs 3.0.

Web 1.0 vs 2.0 vs 3.0.

6
Comments
2 min read
¿Por qué los errores de software se denominan "bugs"?

¿Por qué los errores de software se denominan "bugs"?

7
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2 min read
Why are Software bugs named bugs?

Why are Software bugs named bugs?

7
Comments
2 min read
Subdominios vs. Hosts virtuales

Subdominios vs. Hosts virtuales

6
Comments
2 min read
Subdomains vs. Virtual Hosts

Subdomains vs. Virtual Hosts

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Comments 2
1 min read
Sistemas comunes de codificación y decodificación

Sistemas comunes de codificación y decodificación

3
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2 min read
Common Encoding and Decoding systems

Common Encoding and Decoding systems

6
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2 min read
¿Cómo se estructura una URL?

¿Cómo se estructura una URL?

Comments
2 min read
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