Larry Ellison, co-founder and executive chairman of Oracle Corp., speaks during the Oracle OpenWorld 2018 conference in San Francisco, California, U.S., on Monday, Oct. 22, 2018.David Paul Morris | Bloomberg | Getty ImagesOracle engineers mistakenly triggered a five-day software outage at a number of Community Health Systems hospitals, causing the facilities to temporarily return to paper-based patient records.CHS told CNBC that the outage involving Oracle Health, the company's electronic health...