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 more๐ 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 39 494 subscribers, ranking 4 752 in the Education category and 10 399 in the India region.
๐ Audience metrics and dynamics
Since its creation on ะฝะตะฒัะดะพะผะพ, the project has demonstrated rapid growth, gathering an audience of 39 494 subscribers.
According to the latest data from 10 June, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by 198 over the last 30 days and by 3 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 2.80%. Within the first 24 hours after publication, content typically collects 1.00% reactions from the total number of subscribers.
- Post reach: On average, each post receives 1 107 views. Within the first day, a publication typically gains 393 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 3.
- Thematic interests: Content is focused on key topics such as analytic, dataset, visualization, sql, learning.
๐ Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
โCovering 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_dataโ
Thanks to the high frequency of updates (latest data received on 11 June, 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())
๐ก Tip: Always check for inconsistent spellings and incorrect date formats!
๐ Task 2: Analyzing Sales Trends
A company wants to know which months have the highest sales.
โ
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;
๐ก Tip: Try adding YEAR(SaleDate) to compare yearly trends!
๐ Task 3: Creating a Business Dashboard
Your manager asks you to create a dashboard showing revenue by region, top-selling products, and monthly growth.
โ
Solution (Using Power BI / Tableau):
๐ Add KPI Cards to show total sales & profit
๐ Use a Line Chart for monthly trends
๐ Create a Bar Chart for top-selling products
๐ Use Filters/Slicers for better interactivity
๐ก Tip: Keep your dashboards clean, interactive, and easy to interpret!
Like this post for more content like this โฅ๏ธ
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;
โธป
๐น 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[]
โข .loc[] โ label-based selection
โข .iloc[] โ 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)]
โธป
๐น Round 3: Power BI / Dashboarding
Tasks you should know:
โข Create a dashboard with weekly trends, margins, churn %
โข Use bookmarks/slicers for KPI toggles
โข Apply filters to show top 5 items dynamically
โข Exclude visuals from slicer using โEdit Interactionsโ โ turn off filter icon on card visual
๐ Try replicating dashboards from Power BI Gallery
โธป
๐น Round 4: Business Case + Logic-Based Thinking
Q1. Sales dropped last quarter โ what to check?
โข Compare YoY/QoQ data
โข Identify categories/geos with the biggest drop
โข Analyze order volume vs. avg. order value
โข Check marketing spend, discounts, stockouts
Q2. App downloads โฌ๏ธ, activity โฌ๏ธ โ whatโs wrong?
โข Check Day 1/7/30 retention
โข Is onboarding working?
โข UI bugs or crashes?
โข Compare install โ sign-up โ usage funnel
Q3. Returns increasing โ how to investigate?
โข Analyze return % by brand, category, SKU
โข Check return reasons (defects, sizing, etc.)
โข Compare returnersโ order history
โข Seasonal impact?
โธป
๐ฐ Free Practice Tools:
โข ๐น SQL on LeetCode
โข ๐น Python on Hackerrank
โข ๐น Power BI Gallery
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