Writing SQL Queries

Course Description

Writing SQL Queries develops practical, role-relevant capability in writing accurate and efficient SQL queries for data retrieval, manipulation, joins, aggregation, subqueries, reusable logic, and business analysis. The course connects important platform concepts with implementation decisions, operational controls, and realistic workplace scenarios.

Learners progress through four structured lessons aligned to the current source course focus. The learning path emphasizes accurate configuration or development, secure practices, reliable operations, collaboration, and evidence-based troubleshooting.

By completing the course, learners can apply the skills to role-specific tasks, review results against clear acceptance criteria, and create a practical improvement plan for continued development.

What You Will Learn

• Write SELECT queries with aliases, expressions, DISTINCT, ordering, and limits
• Filter data with comparison, logical, range, list, pattern, and NULL conditions
• Handle conversions, dates, text, numbers, and expression errors
• Use inner, outer, cross, and self joins based on relationship requirements
• Combine results with UNION, INTERSECT, EXCEPT, and duplicate handling
• Detect missing, duplicated, and incorrectly matched rows
• Use GROUP BY, HAVING, aggregate functions, and grouping logic
• Apply subqueries, derived tables, CTEs, and correlated queries

SkillDynamo Training Approach

SkillDynamo delivers this Writing SQL Queries course through instructor-led demonstrations, hands-on exercises, scenario analysis, validation checklists, structured troubleshooting, evidence-based reviews, and a final improvement plan linked to practical workplace outcomes.