Module 11: SQL and PostgreSQL

MODULE 11 · 3 LESSONS

Model relational data, query it safely and preserve integrity with constraints and transactions.

Project checkpoint: Design and query the CourseFlow relational database.

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Module 11 learning loopA four-step visual showing primary keys, foreign keys, normalization, constraints.Module 11 learning loop1Primary Keys2Foreign Keys3Normalization4Constraints

Module 11 learning loop

  1. 1Primary Keys
  2. 2Foreign Keys
  3. 3Normalization
  4. 4Constraints
Module 11 learning loop: a practical sequence used in this lesson.

What this module changes in your work

  • Translate product rules into tables, keys, relationships and constraints.
  • Protect multi-step changes and optimize based on measured access patterns.
  • Use primary keys, foreign keys, normalization in one coherent implementation.
  • Complete this evidence-backed checkpoint: Design and query the CourseFlow relational database.

Lessons

PROJECT CHECKPOINT

Turn sql and postgresql into evidence

Design and query the CourseFlow relational database.

  • Write acceptance criteria for primary keys before implementation.
  • Keep the change small enough that a reviewer can connect it to the intended behavior.
  • Use the most direct check available for foreign keys and save the result.
  • Record one decision you would keep and one you would revisit after feedback.

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