tuple (Noun) A single row in a relational database .
tuple (Noun) A set of comma-separated values passed to a program or operating system as a parameter to a functioncall.
tuple (Noun) In some programming languages, a data type which is similar but distinct from the list data type, whose instances are characterized by having a rather fixed arity, and the elements of which instances can differ from each other by data type.
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tuple In mathematics and computer science, an ordered list of elements.
Wikipedia
In mathematics, a tuple is a finite sequence of objects. Sometimes the finite sequence is also called "ordered list". Each of the objects in the list has a certain type. A tuple consisting of "n" entries is called n-tuple. Tuples are used to describe mathematical objects that are made of certain, well-defined components. They are also used very frequently with databases.
In other words, tuples are like ordered multisets.
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