. View photo The Oracle logo is seen on its campus in Redwood City, California June 15, 2015. REUTERS/Robert Galbraith By Abhirup Roy (Reuters) - Oracle Corp's (ORCL.N) sales fell more than expected in the first quarter, hurt by a strong dollar and a continued drop in licensed software sales and the company warned revenue could fall in the current quarter even on a constant currency basis. Like its rivals such as SAP (SAPG.DE), IBM Corp (IBM.N) and Microsoft Corp (MSFT.O), Oracle is striving to boost Internet-based software sales to head off fast-growing competitors such as Salesforce.com Inc (CRM.N). But, analysts have said Oracle's cloud software business has not been growing fast enough to make up for declines in the 38-year-old company's licensed software business due to reasons ranging from slow customer adoption to... More