Course 55232-A: Writing Analytical Queries for Business Intelligence — Lesson 3: Subqueries, CTEs, Views, Functions, and Procedures

Learning Objectives

• Use subqueries, derived tables, common table expressions, and set logic
• Encapsulate retrieval logic in views, table-valued functions, and stored procedures
• Review readability, reuse, parameterization, security, and performance

Guided Demonstration

1. Review the requirement, environment, dependencies, roles, risks, and expected result.
2. Demonstrate the relevant configuration, development, analysis, or support workflow.
3. Capture settings, outputs, logs, screenshots, code, or test evidence.
4. Compare the observed result with the acceptance criteria and identify gaps.

Hands-On Activity

Refactor a complex analysis into reusable and testable database objects.

• Document assumptions and the planned sequence before making changes.
• Complete the activity and preserve evidence of normal and exception behavior.
• Record issues, corrective actions, and reusable operational or development notes.

Troubleshooting Focus

• Separate symptoms from causes and collect evidence before applying a fix.
• Check configuration, permissions, data, dependencies, capacity, connectivity, and recent changes.
• Validate rollback, recovery, support ownership, and user or business impact.

Validation Checklist

• The requirement and expected result are clear.
• The selected configuration, design, query, code, or process is documented.
• Normal, boundary, failure, security, and operational conditions are reviewed.
• The result is supported by evidence and the next improvement is prioritized.

Lesson Outcome

Learners can explain and apply Subqueries, CTEs, Views, Functions, and Procedures in a realistic scenario and support the result with documented evidence.