Data Analytics & AI | SQL Interviews | Power BI Resources

Data Analyst Roadmap

🎯 GigaChat 3.5 Reasoning: 5 Key Features

1️⃣ Advanced Reasoning: Explores multiple step-by-step paths, using automated verification to reinforce correct answers and self-correct

2️⃣ Autonomous Tool Usage: Independently decides when to call external APIs or revise earlier steps

3️⃣ Linear Attention: Proprietary architecture retains key context points without re-matching from scratch

4️⃣ Token Economy: Uses 37% fewer tokens than DeepSeek V4 Flash Preview on math problems

5️⃣ Proven Performance: Open-source LLM (built on GigaChat 3.5 Ultra) with massive benchmark gains:
• IFBench: 44 → 77
• Natural Plan: 64 → 80
• LiveCodeBench v6: 56 → 85

🔗 MIT License. Weights on Hugging Face:  fp8 | bf16

🚀 The 10 Levels of AI Agents — Where We Stand Today

AI isn’t a single goal — it’s an evolution. From simple rules to intelligent reasoning, here’s the journey 👇

🔹 Levels 1–3: The Basics
• Reactive → Fixed rules, no learning
• Context-Aware → Adapts from past data
• Goal-Oriented → Acts to achieve objectives (Alexa, Siri)

🔹 Levels 4–6: The Present
• Adaptive → Learns from feedback
• Autonomous → Makes independent decisions
• Collaborative → Works with humans/AI (e.g., supply chain systems)

🔹 Levels 7–10: The Future
• Proactive → Anticipates needs
• Social → Understands emotions
• Ethical → Fair & transparent
• Superintelligent → Beyond human capability

👉 Today: Most industries operate at Levels 4–6.
👉 Tomorrow: The focus shifts to ethical & proactive AI — systems that act intelligently and responsibly.

💡 The future of AI isn’t just about power — it’s about purpose and trust.

AI tools to increase your productivity in 2026 👇

1/ Granola:
AI meeting notes that capture and organize conversations without a traditional meeting bot.
https://www.granola.ai

2/ Reclaim AI: Automatically schedules tasks, habits, and meetings around your calendar so you spend less time planning.
https://reclaim.ai

3/ Mem: AI-powered notes that help organize your information and find things quickly without manually managing folders.
https://mem.ai

4/ Shortwave: AI-powered email management that helps you search, summarize, organize, and respond to emails faster.
https://www.shortwave.com

5/ Browse AI: Extract information from websites & automate repetitive web research without manually copying data.
https://www.browse.ai

Data Analyst interviews will be easier if you learn these tools in sequence:

➤ 𝗗𝗮𝘁𝗮 𝗙𝗼𝘂𝗻𝗱𝗮𝘁𝗶𝗼𝗻𝘀
- Excel
- SQL
- Data Visualization (Tableau, Power BI)

➤ 𝗗𝗮𝘁𝗮 𝗠𝗮𝗻𝗶𝗽𝘂𝗹𝗮𝘁𝗶𝗼𝗻
- Pandas (Python)
- Data Analysis and Interpretation

➤ 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀
- Complete 2-3 projects to showcase your skills

Mastering these tools and technologies will help you build a strong foundation in Data Analysis and prepare you for interviews!!

SQL Joins — A Practical Cheatsheet for Professionals

If you’re working with relational data — whether you’re a business analyst, backend dev, or aspiring data scientist — mastering SQL joins isn’t optional. It’s fundamental.

Here’s a concise guide to the most important join types, with real-world use cases:


INNER JOIN

Returns records with matching keys from both tables.
Use case: Show only customers who’ve placed at least one order.


LEFT JOIN (OUTER)

Returns all rows from the left table, and matched rows from the right.
Use case: List all customers, including those with zero orders.


RIGHT JOIN (OUTER)

Returns all rows from the right table. Rarely used, but powerful.
Use case: Show all orders, even if the customer was deleted.


FULL OUTER JOIN

Returns all records from both tables.
Use case: Capture everything — matched and unmatched.


CROSS JOIN

Returns the cartesian product.
Use case: Generate every possible product/supplier combo.


SELF JOIN

Joins a table to itself.
Use case: Show employees and their reporting managers.


Best Practices

Use aliases (A, B) for clean code
Prefer JOIN ON over WHERE for clarity
Always test joins with LIMIT to prevent overloads

✅ SQL for Data Science 🗄️📊

👉 SQL is one of the most important skills for Data Scientists and Data Analysts.

Almost every company stores data inside databases, and SQL helps retrieve and analyze that data.

🔹 1. What is SQL?
SQL = Structured Query Language

👉 Used to:
✔ Store data
✔ Retrieve data
✔ Filter data
✔ Analyze data

🔥 2. Common Database Systems
✔ MySQL
✔ PostgreSQL
✔ SQLite
✔ Microsoft SQL Server

🔹 3. Basic SQL Query

✅ SELECT Statement
Used to retrieve data from a table.

SELECT * FROM employees;

👉 ** means all columns.

🔹 4. Select Specific Columns
SELECT name, salary FROM employees;

🔹 5. WHERE Clause ⭐
Used for filtering data.

SELECT * FROM employees
WHERE salary > 50000;

🔹 6. ORDER BY
Sort data.

SELECT * FROM employees
ORDER BY salary DESC;

✔ ASC → Ascending
✔ DESC → Descending

🔹 7. Aggregate Functions ⭐
Used for calculations.

Function: COUNT()
Purpose: Count rows

Function: SUM()
Purpose: Total

Function: AVG()
Purpose: Average

Function: MAX()
Purpose: Highest value

Function: MIN()
Purpose: Lowest value

✅ Example
SELECT AVG(salary)
FROM employees;

🔹 8. GROUP BY ⭐
Used to group data.
SELECT department, AVG(salary)
FROM employees
GROUP BY department;

🔹 9. Why SQL is Important?
✔ Most asked interview skill
✔ Used daily by analysts & data scientists
✔ Essential for working with databases

🎯 Today’s Goal
✔ Learn SELECT queries
✔ Filter using WHERE
✔ Use aggregate functions
✔ Understand GROUP BY

👉 SQL Resources: https://whatsapp.com/channel/0029VanC5rODzgT6TiTGoa1v 🗄️🔥

💬 Tap ❤️ for more!

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50 𝐨𝐟 𝐭𝐡𝐞 𝐦𝐨𝐬𝐭 𝐢𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭 𝐄𝐱𝐜𝐞𝐥 𝐟𝐨𝐫𝐦𝐮𝐥𝐚𝐬 𝐭𝐡𝐚𝐭 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐲𝐨𝐮 𝐩𝐞𝐫𝐟𝐨𝐫𝐦 𝐯𝐚𝐫𝐢𝐨𝐮𝐬 𝐭𝐚𝐬𝐤𝐬 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐭𝐥𝐲.


S𝐔𝐌: Adds up numbers in a range.
𝐀𝐕𝐄𝐑𝐀𝐆𝐄: Calculates the average of numbers in a range.
𝐌𝐀𝐗: Returns the largest number in a range.
𝐌𝐈𝐍: Returns the smallest number in a range.
𝐂𝐎𝐔𝐍𝐓: Counts the number of cells that contain numbers in a range.
𝐂𝐎𝐔𝐍𝐓𝐀: Counts the number of non-empty cells in a range.
𝐈𝐅: Checks if a condition is met and returns one value if true and another value if false.
𝐕𝐋𝐎𝐎𝐊𝐔𝐏: Searches for a value in the first column of a table and returns a value in the same row from another column.
𝐇𝐋𝐎𝐎𝐊𝐔𝐏: Similar to VLOOKUP, but searches for a value in the first row of a table.
𝐈𝐍𝐃𝐄𝐗: Returns the value of a cell in a specific row and column of a range.
𝐌𝐀𝐓𝐂𝐇: Returns the relative position of an item in a range.
𝐂𝐎𝐍𝐂𝐀𝐓𝐄𝐍𝐀𝐓𝐄: Joins two or more text strings into one string.
𝐋𝐄𝐅𝐓: Returns the leftmost characters from a text string.
𝐑𝐈𝐆𝐇𝐓: Returns the rightmost characters from a text string.
𝐋𝐄𝐍: Returns the number of characters in a text string.
𝐓𝐑𝐈𝐌: Removes leading and trailing spaces from a text string.
𝐔𝐏𝐏𝐄𝐑: Converts text to uppercase.
𝐋𝐎𝐖𝐄𝐑: Converts text to lowercase.
𝐏𝐑𝐎𝐏𝐄𝐑: Capitalizes the first letter of each word in a text string.
𝐓𝐄𝐗𝐓: Formats a number or date value as text using a specified format.
𝐃𝐀𝐓𝐄: Returns the serial number of a particular date.
𝐓𝐎𝐃𝐀𝐘: Returns the current date.
𝐍𝐎𝐖: Returns the current date and time.
𝐃𝐀𝐓𝐄𝐃𝐈𝐅: Calculates the difference between two dates in years, months, or days.
𝐄𝐎𝐌𝐎𝐍𝐓𝐇: Returns the last day of the month, n months before or after a given date.
𝐑𝐎𝐔𝐍𝐃: Rounds a number to a specified number of digits.
𝐑𝐎𝐔𝐍𝐃𝐔𝐏: Rounds a number up, away from zero, to the nearest multiple of significance.
𝐑𝐎𝐔𝐍𝐃𝐃𝐎𝐖𝐍: Rounds a number down, toward zero, to the nearest multiple of significance.
𝐈𝐅𝐄𝐑𝐑𝐎𝐑: Returns a value you specify if a formula evaluates to an error, otherwise returns the result of the formula.
𝐒𝐔𝐌𝐈𝐅: Adds the cells specified by a given condition or criteria.
𝐒𝐔𝐌𝐈𝐅𝐒: Adds the cells in a range that meet multiple criteria.
𝐀𝐕𝐄𝐑𝐀𝐆𝐄𝐈𝐅: Calculates the average of cells specified by a given condition or criteria.
𝐀𝐕𝐄𝐑𝐀𝐆𝐄𝐈𝐅𝐒: Calculates the average of cells that meet multiple criteria.
𝐂𝐎𝐔𝐍𝐓𝐈𝐅: Counts the number of cells specified by a given condition or criteria.
COUNTIFS: Counts the number of cells that meet multiple criteria.
RAND: Returns a random number between 0 and 1.
RANDBETWEEN: Returns a random number between the numbers you specify.
PI: Returns the value of pi (3.14159265358979).
POWER: Raises a number to a power.
SQRT: Returns the square root of a number.
LOG: Returns the logarithm of a number to the base you specify.
EXP: Returns e raised to the power of a given number.
MOD: Returns the remainder of a division operation.
INT: Rounds a number down to the nearest integer.
ABS: Returns the absolute value of a number.
AND: Returns TRUE if all its arguments are TRUE, and FALSE otherwise.
OR: Returns TRUE if any argument is TRUE, and FALSE otherwise.
NOT: Returns the opposite of a logical value.
SUMPRODUCT: Multiplies corresponding components in the given arrays, and returns the sum of those products.
TRANSPOSE: Transposes rows and columns in a range of cells.

9 tips to get started with Data Analysis:

Learn Excel, SQL, and a programming language (Python or R)

Understand basic statistics and probability

Practice with real-world datasets (Kaggle, Data.gov)

Clean and preprocess data effectively

Visualize data using charts and graphs

Ask the right questions before diving into data

Use libraries like Pandas, NumPy, and Matplotlib

Focus on storytelling with data insights

Build small projects to apply what you learn

Data Science & Machine Learning Resources: https://whatsapp.com/channel/0029Va8v3eo1NCrQfGMseL2D

ENJOY LEARNING 👍👍

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Roadmap to become a data analyst

1. Foundation Skills:
•Strengthen Mathematics: Focus on statistics relevant to data analysis.
•Excel Basics: Master fundamental Excel functions and formulas.

2. SQL Proficiency:
•Learn SQL Basics: Understand SELECT statements, JOINs, and filtering.
•Practice Database Queries: Work with databases to retrieve and manipulate data.

3. Excel Advanced Techniques:
•Data Cleaning in Excel: Learn to handle missing data and outliers.
•PivotTables and PivotCharts: Master these powerful tools for data summarization.

4. Data Visualization with Excel:
•Create Visualizations: Learn to build charts and graphs in Excel.
•Dashboard Creation: Understand how to design effective dashboards.

5. Power BI Introduction:
•Install and Explore Power BI: Familiarize yourself with the interface.
•Import Data: Learn to import and transform data using Power BI.

6. Power BI Data Modeling:
•Relationships: Understand and establish relationships between tables.
•DAX (Data Analysis Expressions): Learn the basics of DAX for calculations.

7. Advanced Power BI Features:
•Advanced Visualizations: Explore complex visualizations in Power BI.
•Custom Measures and Columns: Utilize DAX for customized data calculations.

8. Integration of Excel, SQL, and Power BI:
•Importing Data from SQL to Power BI: Practice connecting and importing data.
•Excel and Power BI Integration: Learn how to use Excel data in Power BI.

9. Business Intelligence Best Practices:
•Data Storytelling: Develop skills in presenting insights effectively.
•Performance Optimization: Optimize reports and dashboards for efficiency.

10. Build a Portfolio:
•Showcase Excel Projects: Highlight your data analysis skills using Excel.
•Power BI Projects: Feature Power BI dashboards and reports in your portfolio.

11. Continuous Learning and Certification:
•Stay Updated: Keep track of new features in Excel, SQL, and Power BI.
•Consider Certifications: Obtain relevant certifications to validate your skills.

🖥 Website To Learn Programming & Data Analytics

1. Learn HTML :- html.com
2. Learn CSS :- css-tricks.com
3. Learn Tailwind CSS :- tailwindcss.com
4. Learn JavaScript :- imp.i115008.net/mgGagX
5. Learn Bootstrap :- getbootstrap.com
6. Learn DSA :- t.me/dsabooks
7. Learn Git :- git-scm.com
8. Learn React :- react-tutorial.app
9. Learn API :- rapidapi.com/learn
10. Learn Python :- t.me/pythondevelopersindia
11. Learn SQL :- t.me/sqlspecialist
12. Learn Web3 :- learnweb3.io
13. Learn JQuery :- learn.jquery.com
14. Learn ExpressJS :- expressjs.com
15. Learn NodeJS :- nodejs.dev/learn
16. Learn MongoDB :- learn.mongodb.com
17. Learn PHP :- phptherightway.com/
18. Learn Golang :- learn-golang.org/
19. Learn Power BI :- t.me/powerbi_analyst
20. Learn Data Analytics:- http://t.me/learndataanalysis
21. Learn Excel:- http://t.me/excel_data

Join for more free resources: https://t.me/free4unow_backup

ENJOY LEARNING 👍👍

The Rise of Generative AI in Data Analytics

Today, let’s talk about how Generative AI is reshaping the field of Data Analytics and what this means for YOU as a data professional!

What is Generative AI in Data Analytics Context?

Generative AI refers to AI models that can generate text, code, images, and even data insights based on patterns.

Tools like ChatGPT, Bard, Copilot, and Claude are now being used to:

✅ Automate data cleaning & transformation
✅ Generate SQL & Python scripts for complex queries
✅ Build interactive dashboards with natural language commands
✅ Provide explainable insights without deep statistical knowledge

How Businesses Are Using AI-Powered Analytics

📊 Retail & E-commerce – AI predicts sales trends and personalizes recommendations.

🏦 Finance & Banking – Fraud detection using AI-powered anomaly detection.

🩺 Healthcare – AI analyzes patient data for early disease detection.

📈 Marketing & Advertising – AI automates customer segmentation and sentiment analysis.

Should Data Analysts Be Worried?

NO! Instead of replacing data analysts, AI enhances their work by:

🚀 Speeding up data preparation
🔍 Enhancing insights generation
🤖 Reducing manual repetitive tasks

How You Can Adapt & Stay Ahead

🔹 Learn AI-powered tools like Power BI’s Copilot, ChatGPT for SQL, and AutoML.

🔹 Improve prompt engineering to interact effectively with AI.

🔹 Focus on critical thinking & domain knowledge—AI can’t replace human intuition!

Generative AI is a game-changer, but the human touch in analytics will always be needed! Instead of fearing AI, use it as your assistant. The future belongs to those who learn, adapt, and innovate.

Here are some telegram channels related to artificial Intelligence and generative AI which will help you with free resources:

https://t.me/generativeai_gpt

https://t.me/machinelearning_deeplearning

https://t.me/AI_Best_Tools

https://t.me/aichads

https://t.me/aiindi

Last one is my favourite ❤️

React with ❤️ if you want me to continue posting on such interesting & useful topics

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🔰 List Methods in Python

7 Baby Steps to Become a Data Analyst 👇👇

1. Understand the Role of a Data Analyst:

Learn what a data analyst does, including collecting, cleaning, analyzing, and interpreting data to support decision-making.

Familiarize yourself with key terms like KPIs, dashboards, and business intelligence.

Research industries where data analysts work, such as finance, marketing, healthcare, and e-commerce.


2. Learn the Essential Tools:

Excel: Start with basics like formulas, functions, and pivot tables, then advance to using Power Query and macros.

SQL: Learn to write queries for retrieving, filtering, and aggregating data from databases.

Data Visualization Tools: Master tools like Power BI or Tableau to create dashboards and reports.


3. Develop Analytical Thinking:

Practice identifying trends, patterns, and outliers in datasets.

Learn to ask the right questions about what the data reveals and how it can guide decision-making.

Strengthen problem-solving skills through real-world case studies or challenges.


4. Master a Programming Language (Python or R):

Learn Python libraries like pandas, NumPy, and matplotlib for data manipulation and visualization.

Alternatively, learn R for statistical analysis and its packages like ggplot2 and dplyr.

Work on projects like cleaning messy datasets or creating automated analysis scripts.


5. Work with Real-World Data:

Explore open datasets from platforms like Kaggle or Google Dataset Search.

Practice analyzing datasets related to your area of interest (e.g., sales, customer feedback, or healthcare).

Create sample reports or dashboards to showcase insights.


6. Build a Portfolio:

Document your projects in a way that demonstrates your skills. Include:

Data cleaning and transformation examples.

Visualization dashboards using Power BI, Tableau, or Excel.

Analysis reports with actionable insights.


Use GitHub or Tableau Public to showcase your work.


7. Engage with the Data Analytics Community:

Join forums like Kaggle, Reddit’s r/dataanalysis, or LinkedIn groups.

Participate in challenges to solve real-world problems, such as Kaggle competitions.

Additional Tips:

Gain domain knowledge relevant to your target industry (e.g., marketing analytics or financial analysis).

Focus on communication skills to present insights effectively to non-technical stakeholders.

Continuously learn and upskill as new tools and techniques emerge in the data analytics field.

Join our WhatsApp channel 👇
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