Any database for FPGA real time application use And which kind of database is fastest for real timea apps

Any database for FPGA real time application use And which kind of database is fastest for real timea apps

Any database for FPGA real time application use?
http://nosql-database.org/ here are many types of database, a. relational database faster or non-relational database faster ? as i find many company do not use foreign key even if using relational database b. if non-relational database is faster then which kind of database is the fastest, which one is it in above link?