if the options for the question are only below
- NoSQL
- RDBMS
then the answer is RDBMS
But there are many different type of databases
apart from the common Relational databases and NoSQL databases Like
- Cloud databases
- Columnar databases
- Wide column databases
- Object-oriented databases
- Key-value databases
- Hierarchical databases
- Document databases
- Graph databases
- Time series databases
All these are complex databases and will require a skilled worker to maintain the databases.
so for the question
Which type of database requires a trained workforce for the management of data
General answer is – RDBMS.. but there are others as well