Oracle Quarterly Income Rises 16 Percent  SAN FRANCISCO (Reuters) - Oracle Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ORCL.O target=/stocks/quickinfo/fullquote"&gt;ORCL.O&lt;/A&gt; on Tuesday  reported a 16 percent rise in quarterly profit fueled by steady  demand for its flagship database software, but executives  warned that customers were still cautious about spending on  technology.