The transition from an Oracle relational database to Couchbase's NoSQL document model can be less daunting than it seems, particularly because Couchbase offers a SQL-like query language that is familiar to those accustomed to RDBMS. While Oracle relies on structured tables with primary and foreign key relationships, Couchbase uses JSON objects and arrays, allowing for a more flexible and schema-less data modeling approach. The key differences lie in data modeling, where NoSQL allows for both referring and embedding documents, and the querying process, where Couchbase's N1QL provides a similar experience to Oracle's SQL. Despite these differences, both development and tooling for Couchbase are designed to ease the transition, with tools like the Couchbase Java SDK and CBQ offering comparable functionalities to Oracle's options. Migration tools, such as oracle2couchbase, facilitate the process of moving data from Oracle to Couchbase, highlighting that despite their differences, both platforms share enough similarities to make the switch feasible and beneficial for modern data requirements.