Data Analytics & AI | SQL Interviews | Power BI Resources
🔓Explore the fascinating world of Data Analytics & Artificial Intelligence 💻 Best AI tools, free resources, and expert advice to land your dream tech job. Admin: @coderfun Buy ads: https://telega.io/c/Data_Visual
显示更多📈 Telegram 频道 Data Analytics & AI | SQL Interviews | Power BI Resources 的分析概览
频道 Data Analytics & AI | SQL Interviews | Power BI Resources (@data_visual) 英语 语言赛道中的 是活跃参与者。目前社区聚集了 27 529 名订阅者,在 教育 类别中位列第 6 982,并在 印度 地区排名第 14 627 位。
📊 受众指标与增长动态
自 невідомо 创建以来,项目保持高速增长,吸引了 27 529 名订阅者。
根据 15 九月, 2026 的最新数据,频道保持稳定运转。过去 30 天订阅人数变化为 89,过去 24 小时变化为 -2,整体触达仍然可观。
- 认证状态: 未认证
- 互动率 (ER): 平均受众互动率为 2.41%。内容发布后 24 小时内通常能获得 0.51% 的反应,占订阅者总量。
- 帖子覆盖: 每篇帖子平均可获得 664 次浏览,首日通常累积 141 次浏览。
- 互动与反馈: 受众积极参与,单帖平均反应数为 2。
- 主题关注点: 内容集中在 |--, sql, learning, analytic, visualization 等核心主题上。
📝 描述与内容策略
作者将该频道定位为表达主观观点的平台:
“🔓Explore the fascinating world of Data Analytics & Artificial Intelligence
💻 Best AI tools, free resources, and expert advice to land your dream tech job.
Admin: @coderfun
Buy ads: https://telega.io/c/Data_Visual”
凭借高频更新(最新数据采集于 16 九月, 2026),频道始终保持新鲜度与高覆盖。分析显示受众积极互动,使其成为 教育 类别中的关键影响点。
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| 2 | 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!! | 513 |
| 3 | 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 | 862 |
| 4 | ✅ 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! | 685 |
| 5 | 📢 Advertising in this channel
You can place an ad via Telega․io. It takes just a few minutes.
Formats and current rates: View details | 628 |
| 6 | 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. | 1 003 |
| 7 | 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 👍👍 | 1 089 |
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| 9 | 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. | 1 005 |
| 10 | 🖥 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 👍👍 | 959 |
| 11 | 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
Share with credits: https://t.me/sqlspecialist
Hope it helps :) | 905 |
| 12 | 🔰 List Methods in Python | 852 |
| 13 | 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 👇
https://whatsapp.com/channel/0029VaGgzAk72WTmQFERKh02
Like this post for more content like this 👍♥️
Share with credits: https://t.me/sqlspecialist
Hope it helps :) | 848 |
| 14 | 💎 Product Photography.
Prompt:
Studio shot of a [PRODUCT], elegantly positioned on a [background], soft ambient shadows, smooth gradient backdrop, high-key lighting, shallow depth of field, ultra-sharp focus on the subject, subtle reflections, minimal aesthetic, professional DSLR, premium commercial lighting setup, optimized for high-end product presentation | 1 188 |
| 15 | 5 resources to learn Claude AI for free 👇
1/ Anthropic's Official Guide:
https://support.claude.com/en/articles/8114491-get-started-with-claude
2/ Great Learning's Free Course:
https://www.mygreatlearning.com/academy/learn-for-free/courses/introduction-to-claude
3/ Claude Code in Action:
https://anthropic.skilljar.com/claude-code-in-action
4/ CC for Everyone:
https://ccforeveryone.com/
5/ FreeAcademy's Guide:
https://freeacademy.ai/blog/best-free-claude-code-courses-2026 | 1 220 |
| 16 | Quick Excel Cheatsheet! 📊
Basic Formulas
1. Add: =A1+B1
2. Subtract: =A1-B1
3. Multiply: =A1*B1
4. Divide: =A1/B1
5. Average: =AVERAGE(A1:A10)
6. Sum: =SUM(A1:A10)
Logical Functions
1. IF: =IF(A1>10, "Yes", "No")
2. AND: =AND(A1>5, B1<10)
3. OR: =OR(A1=1, B1=2)
4. EXACT (case-sensitive match): =EXACT(A1, B1)
Lookup Functions
1. VLOOKUP: =VLOOKUP(A1, Table, 2, FALSE)
2. HLOOKUP: =HLOOKUP(A1, Table, 2, FALSE)
3. XLOOKUP: =XLOOKUP(A1, Range1, Range2)
Counting Data Types
1. Count numbers: =COUNT(A1:A10)
2. Count non-empty: =COUNTA(A1:A10)
3. Count blanks: =COUNTBLANK(A1:A10)
4. Is number: =ISNUMBER(A1)
5. Is text: =ISTEXT(A1)
React ❤️ for more | 1 213 |
| 17 | ✅ Data Analytics Roadmap for Freshers 🚀📊
1️⃣ Understand What a Data Analyst Does
🔍 Analyze data, find insights, create dashboards, support business decisions.
2️⃣ Start with Excel
📈 Learn:
– Basic formulas
– Charts & Pivot Tables
– Data cleaning
💡 Excel is still the #1 tool in many companies.
3️⃣ Learn SQL
🧩 SQL helps you pull and analyze data from databases.
Start with:
– SELECT, WHERE, JOIN, GROUP BY
🛠️ Practice on platforms like W3Schools or Mode Analytics.
4️⃣ Pick a Programming Language
🐍 Start with Python (easier) or R
– Learn pandas, matplotlib, numpy
– Do small projects (e.g. analyze sales data)
5️⃣ Data Visualization Tools
📊 Learn:
– Power BI or Tableau
– Build simple dashboards
💡 Start with free versions or YouTube tutorials.
6️⃣ Practice with Real Data
🔍 Use sites like Kaggle or Data.gov
– Clean, analyze, visualize
– Try small case studies (sales report, customer trends)
7️⃣ Create a Portfolio
💻 Share projects on:
– GitHub
– Notion or a simple website
📌 Add visuals + brief explanations of your insights.
8️⃣ Improve Soft Skills
🗣️ Focus on:
– Presenting data in simple words
– Asking good questions
– Thinking critically about patterns
9️⃣ Certifications to Stand Out
🎓 Try:
– Google Data Analytics (Coursera)
– IBM Data Analyst
– LinkedIn Learning basics
🔟 Apply for Internships & Entry Jobs
🎯 Titles to look for:
– Data Analyst (Intern)
– Junior Analyst
– Business Analyst
💬 React ❤️ for more! | 1 072 |
| 18 | 🤖 𝗛𝗢𝗪 𝗧𝗢 𝗙𝗜𝗫 𝗣𝗥𝗢𝗠𝗣𝗧 𝗪𝗜𝗧𝗛 𝗠𝗘𝗧𝗔 𝗣𝗥𝗢𝗠𝗣𝗧𝗜𝗡𝗚:
( Bookmark 🔖 This ) | 1 015 |
| 19 | If you’re just starting out in Data Analytics, it’s super important to build the right habits early.
Here’s a simple plan for beginners to grow both technical and problem-solving skills together:
If You Just Started Learning Data Analytics, Focus on These 5 Baby Steps:
1. Don’t Just Watch Tutorials — Build Small Projects
After learning a new tool (like SQL or Excel), create mini-projects:
- Analyze your expenses
- Explore a free dataset (like Netflix movies, COVID data)
2. Ask Business-Like Questions Early
Whenever you see a dataset, practice asking:
- What problem could this data solve?
- Who would care about this insight?
3. Start a ‘Data Journal’
Every day, note down:
- What you learned
- One business question you could answer with data (Helps you build real-world thinking!)
4. Practice the Basics 100x
Get very comfortable with:
- SELECT, WHERE, GROUP BY (SQL)
- Pivot tables and charts (Excel)
- Basic cleaning (Power Query / Python pandas)
_Mastering basics > learning 50 fancy functions._
5. Learn to Communicate Early
Explain your mini-projects like this:
- What was the business goal?
- What did you find?
- What should someone do based on it?
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