Professional SQL
Reference Pack
A practical SQL reference for practice, interviews, and everyday analytics work.
- 21 pages
- 19 focused guides
- Cross-dialect SQL notes
- PostgreSQL, SQL Server & MySQL
The Professional SQL Reference Pack is included with SQL Master Pro.
19 focused guides
What's inside
A focused path from core filtering and aggregation to window functions and interview distinctions.
SQL Fundamentals
- Logical Query Processing Order
- SELECT, DISTINCT, TOP & LIMIT
- WHERE & Filtering
Aggregation
- Aggregate Functions
- GROUP BY & HAVING
Joining Data
- JOIN Types
- LEFT JOIN Pitfalls
- UNION vs UNION ALL
Advanced Querying
- Subqueries
- EXISTS vs IN
- Common Table Expressions
- CASE WHEN
Real product pages
Preview the pack
These previews are generated directly from the finished reference pack.
Built for understanding
More than a syntax sheet.
Real queries
Learn from practical SQL examples.
Exact outputs
See what each query actually returns.
Common mistakes
Avoid JOIN, NULL, ranking, and filtering traps.
Dialect-aware
PostgreSQL, SQL Server, and MySQL differences noted where relevant.
Final guide
SQL Interview Quick Reference
Review WHERE vs HAVING, COUNT(*) vs COUNT(column), INNER vs LEFT JOIN, UNION vs UNION ALL, IN vs EXISTS, ranking behavior, and common NULL traps on one scannable page.
getsqlmaster.com
Keep SQL close when you need it.
19 focused guides covering the SQL concepts you use in practice, interviews, and analytics work.
The Professional SQL Reference Pack is included with SQL Master Pro.