Data Analytics Projects - SQL, Excel, Tableau, Python & Power BI Interview Resources
Covering all technical and popular stuff about anything related to Data Science: AI, Big Data, Machine Learning, Statistics, general Math and the applications of former. Ads/ Promo: @love_data
Show more📈 Analytical overview of Telegram channel Data Analytics Projects - SQL, Excel, Tableau, Python & Power BI Interview Resources
Channel Data Analytics Projects - SQL, Excel, Tableau, Python & Power BI Interview Resources (@sqlproject) in the English language segment is an active participant. Currently, the community unites 39 681 subscribers, ranking 4 600 in the Education category and 9 817 in the India region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 39 681 subscribers.
According to the latest data from 27 August, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by 37 over the last 30 days and by -1 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 1.80%. Within the first 24 hours after publication, content typically collects 0.74% reactions from the total number of subscribers.
- Post reach: On average, each post receives 716 views. Within the first day, a publication typically gains 292 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 2.
- Thematic interests: Content is focused on key topics such as analytic, dataset, visualization, sql, learning.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“Covering all technical and popular stuff about anything related to Data Science: AI, Big Data, Machine Learning, Statistics, general Math and the applications of former.
Ads/ Promo: @love_data”
Thanks to the high frequency of updates (latest data received on 28 August, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Education category.
import pandas as pd
df = pd.read_csv('sales_data.csv')
df.drop_duplicates(inplace=True) # Remove duplicate rows
df.fillna(0, inplace=True) # Fill missing values with 0
print(df.head())
💡 Tip: Always check for inconsistent spellings and incorrect date formats!
📌 Task 2: Analyzing Sales Trends
A company wants to know which months have the highest sales.
✅ Solution (Using SQL):
SELECT MONTH(SaleDate) AS Month, SUM(Quantity * Price) AS Total_Revenue
FROM Sales
GROUP BY MONTH(SaleDate)
ORDER BY Total_Revenue DESC;
💡 Tip: Try adding YEAR(SaleDate) to compare yearly trends!
📌 Task 3: Creating a Business Dashboard
Your manager asks you to create a dashboard showing revenue by region, top-selling products, and monthly growth.
✅ Solution (Using Power BI / Tableau):
👉 Add KPI Cards to show total sales & profit
👉 Use a Line Chart for monthly trends
👉 Create a Bar Chart for top-selling products
👉 Use Filters/Slicers for better interactivity
💡 Tip: Keep your dashboards clean, interactive, and easy to interpret!
Like this post for more content like this ♥️
Share with credits: https://t.me/sqlspecialist
Hope it helps :)SELECT *
FROM (
SELECT p.product_id, p.category, SUM(o.revenue) AS total_revenue,
RANK() OVER(PARTITION BY p.category ORDER BY SUM(o.revenue) DESC) AS rnk
FROM products p
JOIN orders o ON p.product_id = o.product_id
GROUP BY p.product_id, p.category
) ranked
WHERE rnk <= 3;
Q2. Find users who purchased in January but not in February
SELECT DISTINCT user_id
FROM orders
WHERE MONTH(order_date) = 1
AND user_id NOT IN (
SELECT user_id FROM orders WHERE MONTH(order_date) = 2
);
Q3. Avg. ride time by city + peak hours
SELECT city, AVG(DATEDIFF(MINUTE, start_time, end_time)) AS avg_ride_mins
FROM trips
GROUP BY city;
-- For peak hour detection (example logic)
SELECT DATEPART(HOUR, start_time) AS ride_hour, COUNT(*) AS ride_count
FROM trips
GROUP BY DATEPART(HOUR, start_time)
ORDER BY ride_count DESC;
⸻
🔹 Round 2: Python + Data Cleaning
Q1. Clean messy CSV with pandas
import pandas as pd
df = pd.read_csv('data.csv')
df.columns = df.columns.str.strip().str.lower()
df.drop_duplicates(inplace=True)
df['date'] = pd.to_datetime(df['date'], errors='coerce')
df.fillna(method='ffill', inplace=True)
Q2. Extract domain names from email IDs
emails = ['abc@gmail.com', 'xyz@outlook.com']
domains = [email.split('@')[1] for email in emails]
Q3. Difference: .loc[] vs .iloc[]
• .loc[] → label-based selection
• .iloc[] → index-based selection
Q4. Handle outliers using IQR
Q1 = df['column'].quantile(0.25)
Q3 = df['column'].quantile(0.75)
IQR = Q3 - Q1
filtered_df = df[(df['column'] >= Q1 - 1.5*IQR) & (df['column'] <= Q3 + 1.5*IQR)]
⸻
🔹 Round 3: Power BI / Dashboarding
Tasks you should know:
• Create a dashboard with weekly trends, margins, churn %
• Use bookmarks/slicers for KPI toggles
• Apply filters to show top 5 items dynamically
• Exclude visuals from slicer using “Edit Interactions” → turn off filter icon on card visual
🔗 Try replicating dashboards from Power BI Gallery
⸻
🔹 Round 4: Business Case + Logic-Based Thinking
Q1. Sales dropped last quarter — what to check?
• Compare YoY/QoQ data
• Identify categories/geos with the biggest drop
• Analyze order volume vs. avg. order value
• Check marketing spend, discounts, stockouts
Q2. App downloads ⬆️, activity ⬇️ — what’s wrong?
• Check Day 1/7/30 retention
• Is onboarding working?
• UI bugs or crashes?
• Compare install → sign-up → usage funnel
Q3. Returns increasing — how to investigate?
• Analyze return % by brand, category, SKU
• Check return reasons (defects, sizing, etc.)
• Compare returners’ order history
• Seasonal impact?
⸻
🔰 Free Practice Tools:
• 🔹 SQL on LeetCode
• 🔹 Python on Hackerrank
• 🔹 Power BI Gallery