Data Science Tutorials

Learn how to create a contingency table and perform chi-square tests in R using the chisq.test() function. Discover practical applications and interpret results with confidence.

Learn how to extract and format text position or delimiter using Excel substring functions, including LEFT(), RIGHT(), MID(), and more, with step-by-step instructions.

Learn how to compare two columns in Excel for matches and for duplicates using methods like the equals operator, IF() function, EXACT(), XLOOKUP(), and more.

A comprehensive tutorial on building multi-tool LangChain agents to automate tasks in Python using LLMs and chat models using OpenAI.

An easy-to-follow guide for beginners to learn Azure Synapse, covering everything from setting up your workspace to integrating data and running analytics.

Python's walrus operator := allows you to assign a value to a variable within an expression, combining assignment and use in a single step.

Git prune is a Git command that removes objects from the repository that are no longer reachable from any commit or branch, helping to free up disk space.

The SQL OR operator allows you to filter data by combining multiple conditions, returning rows where at least one condition is true. Learn how to use OR with INSERT, UPDATE, and DELETE statements to modify records in tables.

XLOOKUP() searches in any direction, defaults to exact matches, and has built-in error handling, while VLOOKUP() only searches right and needs manual column indexing.

Discover how to separate names in Excel with features like Text to Columns, Flash Fill, and custom-built formulas. Make your spreadsheets cleaner and easier to work with.

Discover the distinct advantages of REST and GraphQL for modern API design. Learn when to leverage REST for simplicity and caching. Master the flexibility of GraphQL for complex, real-time data needs.

This hands-on guide will help you get started with AWS Athena. Explore its architecture and features and learn how to query data in Amazon S3 using SQL.