After a small one month battle with an offer at $17 for share last October, Oracle Corporation and BEA Systems announced today they have entered into a definitive agreement under which Oracle will acquire all outstanding shares of BEA for $19.375 per share in cash. The offer is valued at approximately $8.5 billion, or $7.2 billion net of BEA’s cash on hand of $1.3 billion. It seems that the will of certain BEA investors to make a substantial gain and the fact that Oracle proposed a better price allowed finally …