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🚨 FINAL REMINDER – 14-Day SQL Pro Challenge 🚨

The batch for the 14-Day SQL Pro Challenge will close on 16 June at 11:59 PM IST.

If you are planning to join, this is your final opportunity to become part of the challenge and learn through real-world SQL projects, hands-on practice, and portfolio-building activities.

Join the Official WhatsApp Group:
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No new participants will be added after the batch closes.

Regards,
Team DataPencil

3 weeks ago | [YT] | 1

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📘 10 Days SQL Beginner Challenge

🚀 Learn SQL from scratch through daily hands-on practice and mini projects.

• Beginner Friendly
• Daily Challenges & Submissions
• Certificate on Successful Completion
• FREE TO JOIN

📅 Last Date: 17 June

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1 month ago | [YT] | 3

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🏆 14 Days SQL Pro Challenge

🔥 Take your SQL skills to the next level with advanced queries, real-world projects, and business case studies.

✅ Advanced SQL Practice
✅ Portfolio-Ready Projects
✅ Certificate on Successful Completion
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📅 Registration Last Date: 16 June

📲 Join WhatsApp Group:
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⚠️ Limited Seats • Limited Certificates

🏢 DataPencil | MSME Registered | ISO 9001:2015 Certified by QSC

1 month ago | [YT] | 4

DataPencil

🏆 14 Days SQL Pro Challenge

🔥 Take your SQL skills to the next level with advanced queries, real-world projects, and business case studies.

✅ Advanced SQL Practice
✅ Portfolio-Ready Projects
✅ Certificate on Successful Completion
✅ FREE TO JOIN

📅 Registration Last Date: 16 June

📲 Join WhatsApp Group:
chat.whatsapp.com/KyJNRfXuPXdIesvhjPTANY

⚠️ Limited Seats • Limited Certificates

🏢 DataPencil | MSME Registered | ISO 9001:2015 Certified by QSC

1 month ago | [YT] | 3

DataPencil

📘 10 Days SQL Beginner Challenge



🚀 Learn SQL from scratch through daily hands-on practice and real-world mini projects.



✅ Beginner Friendly
✅ Daily Challenges & Submissions


✅ Certificate on Successful Completion


✅ FREE TO JOIN



📅 Registration Last Date: 17 June



📲 Join WhatsApp Group:
chat.whatsapp.com/FNAoNpPmMFMD7KGxI6xXYl



⚠️ Limited Seats • Limited Certificates



🏢 DataPencil | MSME Registered | ISO 9001:2015 Certified by QSC

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1 month ago | [YT] | 2

DataPencil

SQL REVISION SERIES QUESTION 9/100

Q9. What is the difference between WHERE and HAVING clause?

WHERE and HAVING are both used to filter data, but they work at different stages.

WHERE filters rows before GROUP BY.

HAVING filters groups after GROUP BY.

WHERE cannot use aggregate functions like SUM(), COUNT(), AVG().

HAVING can use aggregate functions.

Interview Twist:

• HAVING can be used without GROUP BY.
• Aggregate functions cannot be used in WHERE.
• WHERE executes before HAVING.

Easy Interview Line:

WHERE filters rows before grouping.

HAVING filters groups after grouping.

Follow @DataPencil for the complete SQL Interview Revision Series.

#SQL, #SQLInterviewQuestions, #SQLRevision, #WHEREClause, #HAVINGClause, #GroupBy, #SQLAggregation, #DBMS, #RDBMS, #LearnSQL, #SQLTutorial, #MySQL, #SQLForBeginners, #Coding, #Programming, #DataAnalytics, #DataAnalyst, #DatabaseManagement, #InterviewPreparation, #SQLPractice, #CodingInterview, #Database, #TechEducation, #DataScience, #SoftwareEngineer, #BackendDeveloper, #SQLQueries, #TechLearning, #DataPencil

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1 month ago | [YT] | 8

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1 month ago | [YT] | 5

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SQL REVISION SERIES QUESTION 7/100

Q7. What is the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN?

JOINS are used to combine data from multiple tables using a related column.

INNER JOIN returns only matching rows from both tables.

LEFT JOIN returns all rows from the left table and matching rows from the right table.

RIGHT JOIN returns all rows from the right table and matching rows from the left table.

FULL JOIN returns all rows from both tables, including unmatched rows.

This is one of the most important SQL interview questions for beginners and data analysts.

Follow @DataPencil for the complete SQL Interview Revision Series.

#SQL, #SQLInterviewQuestions, #SQLRevision, #SQLJoins, #InnerJoin, #LeftJoin, #RightJoin, #FullJoin, #DBMS, #RDBMS, #LearnSQL, #SQLTutorial, #MySQL, #SQLForBeginners, #Coding, #Programming, #DataAnalytics, #DataAnalyst, #DatabaseManagement, #InterviewPreparation, #SQLPractice, #CodingInterview, #Database, #TechEducation, #DataScience, #SoftwareEngineer, #BackendDeveloper, #SQLQueries, #TechLearning, #DataPencil

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1 month ago | [YT] | 3

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🚀 DATAPENCIL 50-DAYS SQL PRACTICE CHALLENGE 🚀

🔥 FREE TO JOIN 🔥

✅ 50 Days of SQL Practice
✅ Daily SQL Questions
✅ Beginner-Friendly Learning
✅ WhatsApp Group Guidance
✅ Certificate After Completion
✅ Real Practice for Data Analyst Aspirants

🎯 Limited Seats & Limited Certificates

📲 Join the Official WhatsApp Group:
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💡 Start your SQL journey with hands-on practice and improve your skills step-by-step with DATAPENCIL.

#datapencil #sql #sqlchallenge #learnsql #sqlpractice #datascience #dataanalytics #dataanalyst #mysql #postgresql #coding #programming #database #sqlforbeginners

1 month ago | [YT] | 3

DataPencil

SQL REVISION SERIES – QUESTION 6/100

Q6. What is the difference between WHERE and HAVING?

WHERE and HAVING are both used to filter data, but they work at different stages of query execution.

• WHERE filters rows before GROUP BY
• HAVING filters grouped data after GROUP BY

Quick Revision:

• WHERE = Row-level filtering
• HAVING = Group-level filtering
• WHERE cannot use aggregate functions directly
• HAVING is used with aggregate functions like SUM(), COUNT(), AVG()

Example:
SELECT Dept, SUM(Salary)
FROM Employees
GROUP BY Dept
HAVING SUM(Salary) > 120000;

Save this post for interview revision.
Follow @DataPencil for the complete SQL Interview Revision Series.

#SQL, #SQLInterviewQuestions, #SQLRevision, #WhereClause, #HavingClause, #DBMS, #RDBMS, #LearnSQL, #SQLTutorial, #MySQL, #PostgreSQL, #OracleSQL, #SQLForBeginners, #Coding, #Programming, #DatabaseManagement, #InterviewPreparation, #DataAnalytics, #DataAnalyst, #SoftwareEngineer, #BackendDeveloper, #SQLPractice, #TechEducation, #CodingInterview, #Database, #DataScience, #SQLQueries, #TechLearning, #GroupBy, #DataPencil

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1 month ago | [YT] | 4