Hewlett-Packard says that more Oracle databases and applications run on its computers than on any other vendor's machines.

Nonetheless, IT executives attending HP's Discover 2011 user conference in Las Vegas earlier this month didn't find Oracle exhibiting on the show floor. And although the company's name appeared on the show program, it was for a session titled "Oracle Database Migrations to Microsoft SQL Server With HP Services."

Microsoft, meanwhile, was a major presence as HP showed off products optimized for Microsoft's SQL Server database, including the HP Business Data Warehouse Appliance and the HP Database Consolidation Solution for Microsoft SQL, which consolidates transactional databases.

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