German business software maker SAP AG has agreed to buy Sybase Inc. in a $5.8 billion deal that ratchets up SAP's rivalry with database leader Oracle Corp. The acquisition is the first big move by SAP ...

If it weren't for the Sybase-logo button-down shirt, John Chen might be mistaken for an engineering professor. He's charismatic, but not in the self-aggrandizing mode of some technology executives.