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October 2, 2025 by retail.coder

📗 SQL Intermediate Roadmap

Core SQL concepts for real-world usage, building on your beginner knowledge.


➕ Aggregate Functions (COUNT, SUM, AVG, MIN, MAX)


👥 GROUP BY Clause


🎯 HAVING Clause


🌀 Subqueries (Single-row, Multi-row, Correlated)


🔗 Joins – INNER, LEFT, RIGHT, FULL, CROSS, SELF


♻️ UNION, UNION ALL


♻️ INTERSECT & EXCEPT


🎲 CASE Statement (Conditional Logic)


⚖️ COALESCE & NULLIF


🔤 String Functions (CONCAT, LENGTH, SUBSTRING, TRIM)


📅 Date Functions (CURRENT_DATE, DATEADD, DATEDIFF, EXTRACT)


➗ Mathematical Functions (ROUND, CEIL, FLOOR, MOD, ABS)


🪟 Views (CREATE, ALTER, DROP VIEW)


📑 Indexes (Basics)


🚀 Next: Advanced SQL →
Categories SQL Tags Intermediate SQL, must, mustcheck, sql aggregate functions, sql case statement, sql coalesce, SQL CROSS JOIN, SQL date functions, sql except, SQL FULL OUTER JOIN, sql group by, SQL HAVING, SQL indexes, SQL INNER JOIN, sql intersect, sql joins, SQL LEFT JOIN, SQL mathematical functions, sql nullif, SQL RIGHT JOIN, SQL self join, SQL string functions, SQL subqueries, SQL tutorial, sql union, sql union all, SQL views
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  • Advanced SQL Tutorial
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