Power BI & Tableau Resources
🆓 Resources to learn Power BI, Tableau & Data Visualisation Perfect channel to start learning everything about Data Analytics Admin: @coderfun
نمایش بیشتر📈 تحلیل کانال تلگرام Power BI & Tableau Resources
کانال Power BI & Tableau Resources (@powerbi_analyst) در بخش زبانی انگلیسی بازیگری فعال است. در حال حاضر جامعه شامل 55 458 مشترک است و جایگاه 3 073 را در دسته آموزش و رتبه 6 602 را در منطقه الهند دارد.
📊 شاخصهای مخاطب و پویایی
از زمان ایجاد در невідомо، پروژه رشد سریعی داشته و 55 458 مشترک جذب کرده است.
بر اساس آخرین دادهها در تاریخ 13 ژوئن, 2026، کانال فعالیت پایداری دارد. در ۳۰ روز گذشته تغییر اعضا برابر 308 و در ۲۴ ساعت گذشته برابر 37 بوده و همچنان دسترسی گستردهای حفظ شده است.
- وضعیت تأیید: تأیید نشده
- نرخ تعامل (ER): میانگین تعامل مخاطب 2.54% است و در ۲۴ ساعت نخست پس از انتشار، محتوا معمولاً 1.00% واکنش نسبت به کل مشترکان کسب میکند.
- دسترسی پستها: هر پست به طور میانگین 1 406 بازدید دریافت میکند. در اولین روز معمولاً 553 بازدید جمعآوری میشود.
- واکنشها و تعامل: مخاطبان بهطور فعال حمایت میکنند؛ میانگین واکنش به هر پست 3 است.
- علایق موضوعی: محتوا بر موضوعات کلیدی مانند dax, visual, dashboard, chart, slicer تمرکز دارد.
📝 توضیح و سیاست محتوایی
نویسنده این فضا را محل بیان دیدگاههای شخصی توصیف میکند:
“🆓 Resources to learn Power BI, Tableau & Data Visualisation
Perfect channel to start learning everything about Data Analytics
Admin: @coderfun”
به لطف بهروزرسانیهای پرتکرار (آخرین داده در تاریخ 14 ژوئن, 2026)، کانال همواره بهروز و دارای دسترسی بالاست. تحلیلها نشان میدهد مخاطبان بهطور فعال با محتوا تعامل دارند و آن را به نقطه اثرگذاری مهم در دسته آموزش تبدیل کردهاند.
SELECT * FROM Orders
WHERE Sales > (SELECT AVG(Sales) FROM Orders);
📌 14. Common Table Expressions (CTE)
Makes complex queries easier.
WITH SalesCTE AS
(
SELECT Region, SUM(Sales) AS TotalSales
FROM Orders
GROUP BY Region
)
SELECT * FROM SalesCTE;
👉 Very common in Data Analyst interviews.
📌 15. Window Functions (IMPORTANT)
ROW_NUMBER(): Assigns unique numbers
RANK(): Ranks with gaps
DENSE_RANK(): Ranks without gaps
📌 16. Real-World SQL Query
Top 5 Products by Sales
SELECT Product, SUM(Sales) AS TotalSales
FROM Orders
GROUP BY Product
ORDER BY TotalSales DESC
LIMIT 5;
📌 17. SQL Interview Questions
Beginner:
1. What is SQL?
2. Difference between WHERE and HAVING?
3. What is GROUP BY?
4. What is DISTINCT?
5. Explain aggregate functions.
Intermediate:
1. Difference between INNER and LEFT JOIN?
2. What is a CTE?
3. What are Window Functions?
4. What is a Subquery?
5. What is a Primary Key?
📌 18. SQL Project
🛒 E-Commerce Sales Analysis
Tables: Customers, Orders, Products
Tasks:
✔ Total Revenue,
✔ Top Products,
✔ Monthly Sales,
✔ Region Analysis,
✔ Customer Analysis
📌 19. Common SQL Mistakes
❌ Missing JOIN conditions
❌ Using SELECT * everywhere
❌ Ignoring NULL values
❌ Not using aliases
❌ Poor filtering
🎯 Goal of This Topic
After completing SQL, you should be able to:
✅ Query databases confidently
✅ Use JOINS effectively
✅ Aggregate business data
✅ Solve interview questions
✅ Prepare data for Power BI
Double Tap ❤️ For More
-----
1.19 ₽ · /balance_helpSELECT *
FROM Customers;
Output: Returns all columns.
Select Specific Columns
SELECT Name, City
FROM Customers;
👉 Most commonly used SQL statement.
📌 5. WHERE Clause
Used to filter records.
Example:
SELECT *
FROM Orders
WHERE Sales > 5000;
Output: Only orders with sales greater than 5000.
Multiple Conditions
SELECT *
FROM Orders
WHERE Sales > 5000
AND Region = 'West';
📌 6. ORDER BY
Sorts data.
Ascending:
SELECT * FROM Orders ORDER BY Sales ASC;
Descending:
SELECT * FROM Orders ORDER BY Sales DESC;
📌 7. DISTINCT
Removes duplicate values.
Example:
SELECT DISTINCT Region FROM Customers;
Output: Unique regions only.
📌 8. Aggregate Functions
Used to summarize data.
COUNT: SELECT COUNT(*) FROM Orders; → Counts rows.
SUM: SELECT SUM(Sales) FROM Orders; → Calculates total sales.
AVG: SELECT AVG(Sales) FROM Orders; → Calculates average sales.
MIN: SELECT MIN(Sales) FROM Orders; → Smallest value.
MAX: SELECT MAX(Sales) FROM Orders; → Largest value.
📌 9. GROUP BY
Used for aggregation by category.
Example:
SELECT Region, SUM(Sales) AS TotalSales
FROM Orders
GROUP BY Region;
Output:
Region : TotalSales → North : 50000, South : 70000
📌 10. HAVING
Filters grouped data.
Example:
SELECT Region, SUM(Sales)
FROM Orders
GROUP BY Region
HAVING SUM(Sales) > 50000;
👉 HAVING works after GROUP BY.
📌 11. SQL JOINS (VERY IMPORTANT)
Most interview questions come from JOINS.
INNER JOIN: Returns matching records.
LEFT JOIN: All records from left table + matching records from right table
RIGHT JOIN: All records from right table + matching records from left table
FULL JOIN: Returns all records from both tables
📌 12. CASE WHEN
Used like IF statements.
SELECT Product,
CASE WHEN Sales > 10000 THEN 'High' ELSE 'Low' END AS Category
FROM Orders;
📌 13. Subqueries
Query inside another query.Using data to make smarter business decisions.BI helps companies: • Analyze sales • Monitor performance • Track KPIs • Predict trends • Improve profits 📌 4. What is Power BI? Microsoft Power BI is a Business Intelligence and Data Visualization tool developed by Microsoft. It helps businesses: ✔ Connect data ✔ Clean data ✔ Analyze data ✔ Create dashboards ✔ Share reports 📌 5. Why Companies Use Data Analytics Companies generate huge amounts of data daily. Examples: • E-commerce websites • Banking systems • Hospitals • Mobile apps • Social media platforms Companies analyze data to: ✅ Increase revenue ✅ Reduce costs ✅ Improve customer experience ✅ Track employee performance ✅ Predict future trends 📌 6. Types of Analytics There are 4 major types of analytics. 🔹 A. Descriptive Analytics Answers:
“What happened?”Example: • Total sales last month • Number of customers • Revenue generated Power BI Usage: ✔ KPI Cards ✔ Charts ✔ Dashboards 🔹 B. Diagnostic Analytics Answers:
“Why did it happen?”Example: • Why sales dropped? • Why churn increased? Techniques: ✔ Drill-down analysis ✔ Comparisons ✔ Root-cause analysis 🔹 C. Predictive Analytics Answers:
“What may happen next?”Example: • Future sales forecast • Customer churn prediction Technologies: ✔ Machine Learning ✔ AI Models ✔ Forecasting 🔹 D. Prescriptive Analytics Answers:
“What should we do?”Example: • Which marketing strategy to use? • Which products to stock more? Goal: Recommend actions for better business outcomes. 📌 7. What are KPIs? KPI = Key Performance Indicator KPIs measure business performance. 📊 Common KPIs: Domain : KPI Examples Sales : Revenue, Profit Marketing : Conversion Rate HR : Employee Attrition Finance : Net Profit Margin 📌 8. Structured vs Unstructured Data 🔹 Structured Data Data stored in rows and columns.
اکنون در دسترس! پژوهش تلگرام ۲۰۲۵ — مهمترین بینشهای سال 
