Data Science

SQL is way easier when you actually know what matters.

These are the core basics every beginner needs to build projects, answer real business questions, and stop feeling overwhelmed 📊

Master these first and everything else becomes 10x easier.

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SQL

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Ethical Hacking: SQL Injection

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Learn about the SQL command language and SQL injections. Examine SQL injections in MySQL, SQL Server, and Oracle XE, and discover how attackers defeat web application firewalls.

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Author: Malcolm Shore

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Level: Intermediate

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Duration: 1h 45m

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Topics: Ethical Hacking, SQL Injection

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Ethical Hacking: SQL Injection.zip

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Data Science
📱Ethical Hacking: SQL Injection

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Merging and Joining Data

Working with multiple datasets? Combine them just like SQL:

# Inner join (default)
merged = pd.merge(df_sales, df_customers, on='customer_id')

# Left join
pd.merge(df_sales, df_customers, on='customer_id', how='left')

# Concatenate vertically
all_data = pd.concat([df_2023, df_2024], ignore_index=True)

# Join on index
df1.join(df2, on='date')

This wraps up our Data Manipulation Using Pandas Series.

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Data Analyst Roadmap

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