IBM DB2 LUW (Linux, UNIX, and Windows) is a continuation of IBM's longstanding engagement with database technology, tracing its origins back to the advent of relational database systems in the early 1980s. Since then, it has undergone substantial evolution.

At the historical heart of relational databases, IBM played a pivotal role with its System R project, pioneering the implementation of relational concepts developed by Dr. E.F. Codd. Originally, DB2 catered to mainframes, but the diversification of computing environments in the 1990s led to the creation of DB2 LUW to meet the needs of these varied platforms.

DB2 LUW's compatibility with Linux, UNIX, and Windows has given organizations the versatility to utilize the database system on their chosen operating system, a move that has enhanced its usability. As data management and application requirements have progressed, DB2 LUW has adapted, incorporating new features and optimizations to meet these evolving needs.

One such adaptation has been the enhancement for cloud environments, aligning with the industry's shift towards cloud-based services, where it promises improved scalability and performance.

Nonetheless, the sophistication of DB2 LUW can present hurdles, particularly for those new to the system. The comprehensive nature of its features may necessitate a considerable amount of time to learn and configure effectively.

In tandem with its technical advancements, DB2 LUW has maintained a high degree of integration with a suite of data-focused tools and services, situating it as a key element in IBM's data management offerings. This ensures a cohesive data management strategy for organizations, irrespective of their system's intricacy.

The database has consistently prioritized responsiveness to user requirements and maintained a strong emphasis on security. Its implementation of rigorous security protocols is part of a deliberate effort to ensure the protection of stored information.

In direct comparison with competitors like Oracle, DB2 asserts its capability to run a large portion of Oracle's SQL code with minimal adjustments, which can be a significant factor for businesses considering a transition to DB2, especially with large existing Oracle codebases.

Additionally, IBM offers DB2 Express-C, a complimentary edition of its database without the database size restrictions that are common with the free versions of other major databases. Despite its limitations to two CPU cores and 16GB of RAM, DB2 Express-C remains a robust option for handling sizable databases that do not demand heavy processing power.