"Oracle has 48.9 per cent of the RDBMS market, according to Gartner, while MySQL is a number-one choice for web developers and embedded systems makers."
Gartner? So that's facts and figures plucked out of the air then. Having done a fair bit of embedded work, I've never seen MySQL used for a database in that application space. Berkeley DB and, more recently, SQLite certainly - but MySQL is too big and too much of a resource hog for a typical embedded application.
As for Oracle's market share, perhaps that figure's true of commercially licensed databases. However, common sense suggests it's only used as the data store for a minority of web facing applications - the number of which must dwarf the number of old style, conventional, in house data stores.