IBM DB2: From First Query to Enterprise Architecture
The Complete Guide to DB2 for z/OS and LUW
Author: DataField.Dev
First Edition -- March 2026
License: Creative Commons Attribution-ShareAlike 4.0 International (CC-BY-SA-4.0)
You are free to share, adapt, and build upon this work, even commercially, as long as you give appropriate credit and distribute your contributions under the same license. Full license text: https://creativecommons.org/licenses/by-sa/4.0/
About This Book
This is the free DB2 textbook that replaces $5,000 in IBM training courses -- from SQL fundamentals to enterprise administration, covering both DB2 for z/OS and DB2 for LUW in a single, coherent volume.
37 chapters. 8 parts. Approximately 1,400 pages.
From your first SELECT statement to designing high-availability data sharing groups on z/OS and HADR clusters on LUW, this book takes you through the complete journey of becoming a proficient DB2 professional. Every chapter includes hands-on exercises, real-world case studies, and progressive contributions to the Meridian National Bank project -- a production-grade banking database you design, build, optimize, secure, and administer from the ground up.
Series Context
This book is the database companion to the DataField.Dev COBOL trilogy:
| Book | Focus |
|---|---|
| Foundations of COBOL | The COBOL language from first program to production |
| Intermediate COBOL | File handling, data structures, and business logic |
| Advanced COBOL | Enterprise patterns, DB2 embedded SQL, CICS, performance |
| IBM DB2 (this book) | The complete DB2 platform -- SQL, design, admin, performance, HA |
While the Advanced COBOL book dedicates seven chapters to DB2 from the COBOL programmer's perspective (embedded SQL, the precompiler, cursor management, optimizer awareness), this book covers DB2 from the ground up as a complete database platform. It stands entirely on its own -- you do not need to have read any of the COBOL books to use this text. However, if you are a COBOL-DB2 developer, Chapter 32 (Embedded SQL for COBOL and C) connects directly to the material in the Advanced COBOL volume, and cross-references are provided where topics overlap.
Target Audience
- Aspiring and practicing database administrators
- Application developers who interact with DB2
- Mainframe professionals deepening their database skills
- Data engineers building pipelines on DB2
- Oracle and SQL Server professionals migrating to DB2
- Students preparing for IBM DB2 certification exams
- Technical managers who need to understand what their DB2 team does
Dual-Platform Coverage
DB2 exists in two major families that share SQL and core concepts but diverge significantly in architecture, administration, and tooling:
- DB2 for z/OS -- the mainframe original, running the world's banks, insurers, and government agencies
- DB2 for LUW (Linux, UNIX, Windows) -- the distributed version, powering mid-market enterprises, cloud deployments, and modern application stacks
This book covers both with clearly marked [z/OS] and [LUW] sections throughout. You pick your platform track, or you read both.
Certification Alignment
The chapter structure maps to IBM's DB2 certification exam topics, including the IBM Certified Database Administrator (DB2 for z/OS and DB2 for LUW) exam objectives. Chapter 37 provides a complete certification-to-chapter mapping.
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