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“
■ Types are (sets of) things we can talk about.
■ Relations are (sets of) things we say about the things we can talk about.
(There is a nice analogy here that might help you appreciate and remember these important points: Types are to relations as nouns are to sentences.) Thus, in the example, the things we can talk about are employee numbers, names, department numbers, and money values, and the things we say are true utterances of the form “The employee with the specified employee number has t
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― An Introduction to Database Systems
― An Introduction to Database Systems
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Night after night in that office she had ignored her own need to eat, sleep, or sit down. She was just a mind, floating in the dark, soaring over the terrain. As long as she convinced herself this was true, she could almost forget her body existed at all.
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