💬 Query Documentation
This document showcases SQL query development for the Archive Box Management Database, demonstrating progression from basic CRUD operations to complex transaction management and automated workflows.
💬 Query Overview
| Query | Business Scenario | Stakeholder | SQL Techniques | Complexity | Level |
|---|---|---|---|---|---|
| Q1 | Record environmental readings | Archivist | INSERT, SELECT verification | ⭐ | 1️⃣ Foundation |
| Q2 | Register new patron | Librarian | INSERT, SELECT verification | ⭐ | 1️⃣ Foundation |
| Q3 | Remove duplicate records | Administrator | DELETE, data cleanup | ⭐ | 1️⃣ Foundation |
| Q4 | Update box for shipment | Archivist | UPDATE with JOINs, multi-table verification | ⭐⭐ | 2️⃣ Applied Operations |
| Q5 | Track external shipment | Archivist | INSERT with FK relationships, complex SELECT | ⭐⭐ | 2️⃣ Applied Operations |
| Q6 | Process item return | Librarian | TRIGGER, cascading updates, automated workflow | ⭐⭐⭐ | Advanced |
| Q7 | Check available items | Librarian | VIEW creation, nested SUBQUERIES (3 levels) | ⭐⭐⭐⭐ | Advanced |
| Q8 | Patron checkout transaction | Librarian | TRANSACTION (ACID), multi-step workflow | ⭐⭐⭐⭐⭐ | Advanced |
Summary
This query collection demonstrates:
| Skill Level | Technical Capabilities Demonstrated | Queries |
|---|---|---|
| Foundation Skills | • INSERT/DELETE operations with data validation • Foreign key constraint handling • SELECT verification patterns • Single-table CRUD proficiency | Query 01: Foundational Operation |
| Applied Skills | • Multi-table JOIN optimization (4+ tables) • UPDATE with referential integrity • Complex SELECT with FK relationships • Data consistency across related entities | Query 02: Applied Operation |
| Advanced Skills | • Stored procedure design (TRIGGER automation) • 3-level nested subquery logic • ACID transaction implementation • VIEW creation for query optimization • Cascading update patterns • Error handling and rollback capability | Query 06: Item Return Processing Query 07: Available Items Check Query 08: Checkout Transaction |
| Next Steps: View Complete SQL Files | Return to Main README |