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Are there any databases successfully in production in high-value transactional environments other than oracle or DB2? Teradata! And IMS, but that's not relati

• snaky 9y ago
  And ADABAS (officially declared fully supported through the year 2050 and beyond). Most often considered non-relational too. High-value transactional environments most often neither relational nor even running on operating system (in modern sense at least), like zTPF "because a real operating system is too high level and therefore too slow for real transaction processing needs". Current users of TPF include Sabre, VISA, American Airlines, American Express, HP SHARES (formerly EDS), Holiday Inn, Alitalia, KLM, Amtrak, Marriott International, Travelport, Citibank, Citifinancial, Air Canada, Delta Air Lines, Japan Airlines and many others.