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50 Top SQL Articles for 2025

Welcome to the Top SQL Articles for 2025!

This carefully curated list features the most popular, useful, and highly rated SQL articles from LearnSQL.com. These articles were selected based on their clarity, actionable insights, and real-world relevance. Whether you're new to SQL or a seasoned professional, you'll find guides, tutorials, and examples that can help you:

  • Improve your understanding of SQL basics.
  • Master advanced topics like window functions, CTEs, and joins.
  • Solve real-world challenges with practical examples.

These resources have been praised by thousands of SQL learners and professionals for making complex topics simple and easy to apply.

Here’s the Full List of Articles:

  1. How to Join 3 Tables (or More) in SQL
  2. What Is a Common Table Expression (CTE) in SQL?
  3. How to Find Duplicate Values in SQL
  4. How to Use the SQL PARTITION BY With OVER
  5. How to LEFT JOIN Multiple Tables in SQL
  6. How to Concatenate Two Columns in SQL – A Detailed Guide
  7. How to Use the SQL RANK OVER (PARTITION BY)
  8. How to Use SUM() with OVER(PARTITION BY) in SQL
  9. What Is the WITH Clause in SQL?
  10. How to Group by Multiple Columns in SQL
  11. The LAG Function and the LEAD Function in SQL
  12. COUNT OVER PARTITION BY: An Explanation with 3 Practical Examples
  13. 25 Advanced SQL Query Examples
  14. How the Division Operator Works in SQL
  15. How to Use WHERE with GROUP BY in SQL
  16. What Is a Nested Query in SQL?
  17. 5 Practical Examples of Using ROWS BETWEEN in SQL
  18. How to Use CASE WHEN With SUM() in SQL
  19. What Is a LEFT OUTER JOIN in SQL? An Explanation With 4 Examples
  20. How to Write a Recursive CTE in SQL Server
  21. How to Join Two Tables in SQL
  22. How to SUM() with GROUP BY: A Detailed Guide with 8 Examples
  23. How to Query a Parent-Child Tree in SQL
  24. How to Join Only the First Row in SQL
  25. How to Use CASE WHEN in GROUP BY
  26. How to Solve the “must appear in the GROUP BY clause or be used in an aggregate function” Error in PostgreSQL
  27. SQL Joins: 12 Practice Questions with Detailed Answers
  28. How to Use Aliases with SQL JOINs
  29. What Is a SQL Running Total and How Do You Compute It?
  30. 5 Practical Examples of SQL’s WITH Clause
  31. How to Calculate the Difference Between Two Rows in SQL
  32. How to Use COUNT() with GROUP BY: 5 Practical Examples
  33. SQL CTEs Explained with Examples
  34. What Is the OVER() Clause in SQL?
  35. How Do You Get Rid of Duplicates in an SQL JOIN?
  36. How to Write Multiple CTEs in SQL
  37. Can you Join two Tables Without a Common Column?
  38. 7 SQL JOIN Examples With Detailed Explanations
  39. What Is a Self Join in SQL? An Explanation With Seven Examples
  40. Can You Use Multiple WITH Statements in SQL?
  41. How to Use GROUP BY and ORDER BY in the Same Query: A Detailed Guide
  42. How to Use ROW_NUMBER OVER() in SQL to Rank Data
  43. How to Use CASE in ORDER BY in SQL
  44. How ORDER BY and NULL Work Together in SQL
  45. How to Use the COALESCE() Function in SQL
  46. The SQL Substring Function in 5 Examples
  47. Top 27 Advanced SQL Interview Questions with Answers
  48. How to Find the Nth-Highest Salary by Department with SQL
  49. 10 Beginner SQL Practice Exercises With Solutions
  50. How to Solve the “must appear in the GROUP BY clause or be used in an aggregate function” Error in PostgreSQL

These articles are your go-to resources for mastering SQL, staying productive, and solving real-world data problems. Happy learning!