Data Science Tutorials

A database schema provides a comprehensive blueprint for the organization of data, detailing how tables, fields, and relationships are structured. Read to learn about the schema types, such as star, snowflake, and relational schemas.

Understand and implement the Adam optimizer in Python. Learn the intuition, math, and practical applications in machine learning with PyTorch

RankGPT is a method that uses LLMs like ChatGPT to re-rank retrieved documents in RAG systems, improving the quality of the output by prioritizing the most relevant information.

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.

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.

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.

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.

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

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.