Querying Microsoft SQL Server 2025 — Lesson 2: Filtering, Joins, Subqueries, and Reusable Query Logic

Topics Covered

• Filter and sort result sets with predicates, pattern matching, ranges, and ordering
• Combine data with inner, outer, cross, and self joins
• Use subqueries, common table expressions, set operators, and derived tables
• Step-by-step implementation workflow and configuration decisions
• Hands-on verification of core features, data, and expected results
• Documentation of assumptions, dependencies, naming, and change controls

Guided Practice Steps

1. Translate the lesson requirement into a clear Querying Microsoft SQL Server 2025 implementation or analysis objective.
2. Document assumptions, selected tools or features, dependencies, risks, and expected results.
3. Perform the guided task, capture evidence, and compare the result with the acceptance criteria.
4. Record issues, corrective actions, and a reusable operational or development note.

Practical Activity

Create a multi-table reporting query using filters, joins, a CTE, and defensible NULL handling.

• Define the scenario, inputs, constraints, and expected outcome.
• Complete the activity and preserve screenshots, outputs, logs, code, or decision evidence.
• Review the result, identify gaps, and document corrective or improvement actions.

Validation Checklist

• The stated requirement and expected outcome are clear.
• Configuration, code, data, or design decisions are documented.
• Normal, boundary, failure, security, and operational considerations are reviewed.
• Evidence supports the conclusion and the next action is prioritized.

Lesson Outcome

Learners can explain and apply Filtering, Joins, Subqueries, and Reusable Query Logic within a realistic Querying Microsoft SQL Server 2025 scenario and support the result with validation evidence.