advantages are more compare disadvantages. u need to google database vs static and you can figure out
Advantage of MYSQL is its Open Source and can be downloaded free from MYSqL site. Its has fast Execution when Query perform on single table. Its follow the self Indexing which help searching fast. Simple to use as its follow the simple SQL Statement.
Open source, lots of documentation, fast, easy to understand. I prefer it over other database software available but it really is personal preference and the design of the site that matters.