Power BI & Tableau Resources
🆓 Resources to learn Power BI, Tableau & Data Visualisation Perfect channel to start learning everything about Data Analytics Admin: @coderfun
Больше📈 Аналитический обзор Telegram-канала Power BI & Tableau Resources
Канал Power BI & Tableau Resources (@powerbi_analyst) языкового сегмента Английский является активным участником. Сейчас сообщество объединяет 55 458 подписчиков, занимая 3 073 место в категории Образование и 6 602 место в регионе Индия.
📊 Показатели аудитории и динамика
С момента создания невідомо проект демонстрирует стремительный рост, собрав аудиторию из 55 458 подписчиков.
Согласно последним данным от 13 июня, 2026, канал показывает стабильную активность. За последние 30 дней изменение числа участников составило 308, а за последние 24 часа — 37, при этом общий охват остаётся высоким.
- Статус верификации: Не верифицирован
- Уровень вовлечённости (ER): Средний показатель вовлечённости аудитории составляет 2.54%. В первые 24 часа после публикации контент обычно набирает 1.00% реакций от общего числа подписчиков.
- Охват публикаций: В среднем каждый пост получает 1 406 просмотров. В течение первых суток публикация набирает 553 просмотров.
- Реакции и взаимодействия: Аудитория активно поддерживает контент: среднее количество реакций на один пост — 3.
- Тематические интересы: Контент сосредоточен на ключевых темах, таких как dax, visual, dashboard, chart, slicer.
📝 Описание и контентная политика
Автор описывает ресурс как площадку для выражения субъективного мнения:
“🆓 Resources to learn Power BI, Tableau & Data Visualisation
Perfect channel to start learning everything about Data Analytics
Admin: @coderfun”
Благодаря высокой частоте обновлений (последние данные получены 14 июня, 2026) канал поддерживает актуальность и высокий уровень охвата публикаций. Аналитика показывает, что аудитория активно взаимодействует с контентом, что делает его важной точкой влияния в категории Образование.
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.
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