Oracle, the US computer firm, has returned to Credit Suisse for advice on the $3.3bn (€2.5bn) purchase of a software company, after using Morgan Stanley for a similar deal in 2005.

In 2004 Credit Suisse advised Oracle in its 18-month struggle to take over rival PeopleSoft. Oracle had launched its original offer in June 2003 and the deal become increasingly acrimonious as the two companies' management teams exchanged barbed comments.