SQL Querying: Fundamentals — Lesson 2: Filtering, Sorting, Expressions, and Scalar Functions

Topics Covered

• Filter rows with comparison, logical, range, list, pattern, and NULL predicates
• Sort and rank result sets with ORDER BY and controlled top-row selection
• Use scalar functions and simple expressions to transform output
• 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 SQL Querying: Fundamentals 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 filtered and sorted outputs using multiple predicate types and functions.

• 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, Sorting, Expressions, and Scalar Functions within a realistic SQL Querying: Fundamentals scenario and support the result with validation evidence.