Data Science Educational Resources
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Interviews
Utilizing DENSE_RANK for Data Deduplication in SQL
Data deduplication in SQL can be done in several ways. Using DENSE_RANK() is one. Today, we’ll talk about using this function to improve your data’s quality.
Nathan Rosidi -
How to Determine Python String Length?
Discover the simple yet powerful tools Python offers to measure string length effortlessly, enhancing your coding efficiency and data manipulation skills.Nathan Rosidi -
From Arrays to Lists: Converting Numpy Arrays with Python
Learn the essential methods for converting NumPy arrays to Python lists, enhancing your data handling skills in Python with practical examples and applications.Nathan Rosidi -
PySpark GroupBy Guide: Super Simple Way to Group Data
Master efficient data grouping techniques with PySpark GroupBy for optimized data analysis.Nathan Rosidi -
Adding and Removing List Elements with Python
Explore the versatile techniques of adding and removing elements in Python lists to enhance data manipulation and streamline your coding workflow.Nathan Rosidi -
SQL PARTITION BY: Advanced Analytical Insights
SQL PARTITION BY makes SQL window functions – already a powerful analytical tool – even more suitable for advanced analytical insights from your data.Nathan Rosidi -
What Are the Steps to Cast INT in SQL for Type Conversion?
Cast INT in SQL is a must-know for anyone even remotely interested in data handling and analysis. This article will cover all the important cast INT topics.Nathan Rosidi -
How to Perform Python String Concatenation?
Learn essential Python string concatenation techniques, including the + operator, join() method, f-strings, and format() method.Nathan Rosidi -
How to Drop Duplicates in PySpark?
Learn how to ensure accurate analysis by identifying and removing duplicates in PySpark, using practical examples and best practices for handling large datasets.Nathan Rosidi -
How to Use SQL Wildcards for Flexible Data Queries
This article is all about uncertainty and using it to add flexibility to SQL queries. How do you do that? Start using one of the five SQL wildcards regularly.Nathan Rosidi -
How Does SQL Date Formatting Work?
In this article, we explore the SQL date format. We’ll deal with how standard and custom date formatting work in four of the most popular SQL flavors.Nathan Rosidi -
Simplifying SQL Queries with Aliases: A How-To Guide
SQL aliases are a simple yet efficient way of simplifying your SQL queries. In this guide, we’ll show you all the benefits and provide examples of their use.Nathan Rosidi -