The "ultimate" database for modern enterprises in the digital world

IBM DB2® for z/OS® is still the undisputed leader for storing and leveraging mission critical data. It remains the "gold standard" for system availability, scalability, security and cost effectiveness. A majority of Fortune 500 companies, including the world’s top banks, retailers and insurance providers trust DB2 for z/OS for storing their data.

Built on the core capabilities of DB2 11, DB2 12 gives businesses the capabilities needed to meet the business demands of the future by:

  • Providing scale and speed for next era of Mobile and Interconnected devices
  • Application support for Cloud, Analytics and Mobile
  • Delivering faster analytical insights
  • Speedy In-Memory database Performance reducing costs
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The foundation for business-critical analytics

DB2 for z/OS makes it easier to bring analytic components closer to the core operational data—reducing latency, complexity, and costs while improving data quality and governance.

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Total cost of ownership

Find simpler, faster upgrades for speedy ROI that reduces administration and system management. This simplifies application development so most clients can achieve out-of-the-box CPU savings of up to 10% for complex OLTP.

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New revenue streams by enhanced data accessibility

Is your valuable data out of reach to developers and business partners? Develop mobile and cloud applications quickly, simply by securely connecting mobile applications to relevant enterprise data while maintaining the agility and simplicity.

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Availability, business resiliency & scalability

Real-world proven resiliency and security are some of the core reasons why clients choose DB2 and System z. DB2 11 continues to raise the bar with additional capabilities for even higher availability and resiliency. With the explosion of Data scalability enhancements, make DB2 the right choice for large and growing databases.

IBM DB2 for z/OS features

The foundation for real-time analytics

The foundation for real-time analytics

As the foundation for the z Analytics solution, DB2 for z/OS enables organizations to deliver real-time analytics across the organization. It helps integrate mission critical applications with business critical analytics, ensuring secure, timely, accurate and cost-effective insight in real-time. It embraces the proven qualities of service of IBM z Systems with the highest levels of availability, scalability and performance to support an agile, integrated on-premise and cloud environment. DB2 for z/OS combined with IBM DB2 Analytics Accelerator form a self-managing, hybrid database management system that runs each workload in the most efficient way, so each transaction - OLTP, batch, analytic query - is executed in its optimal environment for greatest performance and cost efficiency. By supporting transactional and analytic processing in a single environment, organizations can infuse DB2 for z/OS data into business critical analytic applications; offer fast, accurate responses to analytic queries and predictive scores; and give data analysts a holistic view of enterprise data never before possible - all while easing analytics deployment, containing costs and improving time to analysis.

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Cost savings for every workload

Cost savings for every workload

DB2 12 offers up to 23% lower CPU cost through advanced in-memory techniques and enhanced continuous availability, scalability, and security for business-critical information.

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DB2 ready for Mobile Application Development

DB2 ready for Mobile Application Development

The number and importance of mobile applications for business-critical activities continues to grow. Securely connecting those mobile applications to relevant enterprise data while maintaining the agility and simplicity of their development models is critical. DB2 can now store JSON data, retaining development flexibility and simplicity while adding the security, resiliency, and consolidated system and operation management of DB2—the best of both worlds for enterprise clients.

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Enhanced resiliency and security

Enhanced resiliency and security

Online schema enhancements allow changes to database objects while maximizing availability of the changed objects. The number of REORG jobs needed has been reduced while, at the same time, delivering performance improvements of up to 20%. Additional performance improvements of up to 70% for LOAD and up to 40% for RECOVER drive additional benefits and resiliency.

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What’s New

Learn about some of the key new features of DB2 for z/OS and how they support your continuously evolving database needs. Today, the spotlight is on the central role that DB2 for z/OS plays in today’s modern application development environment.

What's New

Modern Application Development

Enhanced resiliency and security

DevOps with DB2: Automated deployment of applications with IBM Urban Code Deploy

With Urban Code Deploy, you can easily automate the deployment and configuration of database schema changes in DB2 11 and 12. The automation reduces the time, costs and complexity of deploying and configuring your business-critical apps, getting you to business value faster and more efficiently.

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Enhanced resiliency and security

Modern language support for application development

DB2 for z/OS 11 and 12 now support application development in many modern programming and scripting languages. Application developers can use languages such as Python, Perl and Ruby on Rails to write DB2 for z/OS applications. Getting business value from your mainframe applications is now easier than ever before.

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Enhanced resiliency and security

DB2 REST services to improve efficiency and security

The DB2 REST service provider, available in DB2 for z/OS 11 and 12, unleashes your enterprise data and applications on DB2 for z/OS for the API economy. You can efficiently create consumable, scalable and RESTful services. Mobile and cloud app developers can consume these services to securely interact with business-critical data and transactions, without special DB2 for z/OS expertise.

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Enhanced resiliency and security

Continuous delivery of DB2 enhancements

With the adoption of continuous delivery immediately following the release of DB2 12 for z/OS, IBM now delivers new DB2 for z/OS capabilities and enhancements in a single service stream, as soon as they are ready. You can benefit from new capabilities and enhancements sooner, without waiting for — and migrating to — full new product releases.

One such continuously delivered enhancement is the LISTAGG built-in function. It improves productivity for developers and supports faster delivery of business-critical information — in the optimal format — for decision makers.

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Browse Related Products

DB2 12 for z/OS

An enterprise database for mission critical data providing secure, seamless integration for analytics, mobile and cloud.

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DB2 11 for z/OS

Leverages improved data serving capabilities to drive down risk and reduce business costs.

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IBM DB2 Analytics Accelerator for z/OS

Combines System z Quality of Service and Netezza technology to accelerate complex queries in a highly secure and available environment.

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DB2 for z/OS Value Unit Edition

Enables the deployment of new application workloads on the System z platform. It provides DB2 for z/OS data server functionality at a one-time charge price, and is available for eligible net new applications or workloads.

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DB2 Tools and Utilities

IBM DB2 tools and utilities for z/OS can help simplify the management of your environment, reduce operating costs, and maximize database performance and availability.

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DB2 Query Management Facility

Your ability to distribute reporting information quickly throughout the enterprise has been exponentially increased thru the WebSphere® component of QMF™ Enterprise Edition. The Eclipse based product extends QMF-supported platforms to Linux, Solaris and HP-UX. QMF Enterprise Edition also extends its support beyond DB2 9 to include IDS support.

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Client success stories


Swiss Mobiliar client story

Swiss Mobiliar

Swiss Mobiliar used IBM DB2 for z/OS to deliver rapid processing of reporting queries with no increase in active server cores.

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Norfolk Southern Corp client story


Nationwide underwent a radical, five-year transformation from legacy core systems to a modern, real-time, multi-channel banking system with IBM DB2 for z/OS at its heart.

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ATB Financial


See how Halkbank deployed new environments on the IBM mainframe to support multi-channel banking and accelerate internal risk reporting and analytics.

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IBM DB2 for z/OS resources


DB2 12 for z/OS – eBook Overview

This book shares an overview of how DB2 12 for z/OS addresses business and technological needs and will also help architects and IT professionals understand DB2 12’s capabilities.


DB2 12 for z/OS - IBM Mobile Tutorial

Learn how you can build a DB2 for z/OS mobile application using IBM Mobile Developer Edition.