Write a query to find the total amount spent by each customer.
Bonus: Sort the result from highest spender to lowest.
Drop your answer below 👇
#SQL#DataAnalytics#LearnSQL#DataSkills
Another SQL Challenge 🔥
🧩 SQL CHALLENGE #2 — Filter like a pro!
Same employees table:
id | name | department | salary
1 | Ada | Tech | 85000
2 | Bola | HR | 52000
3 | Chidi | Tech | 91000
4 | Demi | Finance | 67000
5 | Emeka | HR | 48000
✅ TASK: Write a query to return only employees in the Tech department earning more than 80,000.
Repost to help a friend learn SQL 🔁
#SQL#WhereClause#DataAnalytics#LearnSQL#TechSkills
SQL CHALLENGE. Can you solve this?
You have this table called employees:
id | name | department | salary
1 | Ada | Tech | 85000
2 | Bola | HR | 52000
3 | Chidi | Tech | 91000
4 | Demi | Finance | 67000
5 | Emeka | HR | 48000
✅ TASK: Write a query to show only the name and salary columns for ALL employees.
Drop your answer below 👇
#SQL#DataAnalytics#LearnSQL#DataSkills
Let’s make this interesting 🤔
Write Query to give the list of staff that their salary are higher than the average salaries of the company.
Drop your answer below 👇
#SQL#DataAnalytics#LearnSQL#DataSkills 😉😊
SQL CHALLENGE. Can you solve this?
You have this table called employees:
id | name | department | salary
1 | Ada | Tech | 85000
2 | Bola | HR | 52000
3 | Chidi | Tech | 91000
4 | Demi | Finance | 67000
5 | Emeka | HR | 48000
✅ TASK: Write a query to show only the name and salary columns for ALL employees.
Drop your answer below 👇
#SQL#DataAnalytics#LearnSQL#DataSkills
SQL CHALLENGE. Can you solve this?
You have this table called employees:
id | name | department | salary
1 | Ada | Tech | 85000
2 | Bola | HR | 52000
3 | Chidi | Tech | 91000
4 | Demi | Finance | 67000
5 | Emeka | HR | 48000
✅ TASK: Write a query to show only the name and salary columns for ALL employees.
Drop your answer below 👇
#SQL#DataAnalytics#LearnSQL#DataSkills
Today's challenge:
You have a table called contacts with columns: first_name, last_name, email, phone
Write one query that: → Returns full name in UPPERCASE → Cleans the email (trim lowercase) Drop your answer below
#SQLSprint#BuildInPublic#LearnSQL#DataAnalytics
SQL isn't just querying data — it's CLEANING it 🧹
Know these:
✅ LIKE → pattern match
✅ TRIM → remove spaces
✅ COALESCE → fix NULLs
✅ CASE WHEN → conditional logic
✅ ALTER TABLE → fix structure
#SQL#DataAnalytics#LearnSQL
Here’s what I’ve mastered so far (from zero → confident):
1. SELECT, FROM, WHERE, LIMIT
2. ORDER BY, GROUP BY, COUNT, SUM, AVG
3. HAVING vs WHERE — filtering before vs after grouping
4. INNER JOIN & LEFT JOIN
#PostgreSQL#LearnSQL#DataEngineerJourney
SQL isn’t hard, consistency real projects make it simple. Master the basics, practice JOINs, use aggregates, and build projects. That’s how you become job-ready in data analytics.
#SQL#DataAnalytics#DataAnalyst#TechCareer#LearnSQL
WHERE filters rows before aggregation.
HAVING filters aggregated results after grouping.
Understanding this distinction helps you write faster queries, avoid logical errors, and answer interview questions with confidence. One clause works on raw data, the other works on summarized data. #SQL#DataAnalytics#DataEngineer#Database#LearnSQL
🔥 Top 5 SQL Queries Every Data Engineer Must Know 🚀
From data extraction to transformation, these SQL queries are the backbone of Data Engineering.
✅ SELECT
✅ WHERE
✅ ORDER BY
✅ GROUP BY
✅ JOIN
Master these concepts to work with large datasets, pipelines, ETL processes, and real-world databases like a pro 💻
Save this post for quick revision 📌
#DataEngineer#SQL#DataEngineering#BigData#Database#Programming#LearnSQL
If you want to practice SQL seriously, use platforms that test logic and real scenarios. Explore SQLZoo, LeetCode, HackerRank, StrataScratch, Kaggle, and more to sharpen query writing and interview skills. Consistent practice builds confidence. #SQL#DataAnalytics#LearnSQL#DataCareers