Business software maker Oracle Corp. said on Monday it would buy Cerner Corp. for $28.3 billion in its biggest-ever deal, gaining access to a trove of data from one of the biggest healthcare IT firms in the United States. Cerner shareholders will receive $95 in cash for each share they hold, representing a premium of 5.8 percent to the company’s last closing price. Oracle will be able to use the data from Cerner to train and improve the software maker’s artificial intelligence-based cloud services. This is likely to give Oracle an advantage and draw more healthcare clients to its cloud platform. Cerner, whose software traditionally ran in its customers’ data centers, had started shifting its service to cloud computing providers. It had selected Amazon.com, Inc.’s Amazon Web Services as its “preferred” cloud provider in 2019. However, Oracle said on Monday it will move Cerner’s software to its own cloud computing …