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In relational algebra, a rename is a unary operation written as / where: . R is a relation; a and b are attribute names; b is an attribute of R; The result is identical to R except that the b attribute in all tuples is renamed to a. [1]
In practical terms, if a relation is thought of as a table, then projection can be thought of as picking a subset of its columns. For example, if the attributes are (name, age), then projection of the relation {(Alice, 5), (Bob, 8)} onto attribute list (age) yields {5,8} – we have discarded the names, and only know what ages are present.
Subroutine in Excel calculates the square of named column variable x read from the spreadsheet, and writes it into the named column variable y. The Windows version of Excel supports programming through Microsoft's Visual Basic for Applications (VBA), which is a dialect of Visual Basic .
Dimensionality reduction, or dimension reduction, is the transformation of data from a high-dimensional space into a low-dimensional space so that the low-dimensional representation retains some meaningful properties of the original data, ideally close to its intrinsic dimension.
The first list is based on the Stockholm International Peace Research Institute (SIPRI) fact sheet, which includes a list of the world's top 40 military spenders as of 2023, based on current market exchange rates.
Billy Bob Thornton [2] [3] (born August 4, 1955) is an American actor, filmmaker, singer and songwriter. He received international attention after writing, directing and starring in the independent drama film Sling Blade (1996), for which he won an Academy Award for Best Adapted Screenplay and was nominated for an Academy Award for Best Actor.
Seinfeld began as a 23-minute pilot titled "The Seinfeld Chronicles".Created by Jerry Seinfeld and Larry David, developed by NBC executive Rick Ludwin, and produced by Castle Rock Entertainment, it was a mix of Seinfeld's stand-up comedy routines and idiosyncratic, conversational scenes focusing on mundane aspects of everyday life like laundry, the buttoning of the top button on one's shirt ...
The leopard (Panthera pardus) is one of the five extant cat species in the genus Panthera.It has a pale yellowish to dark golden fur with dark spots grouped in rosettes.Its body is slender and muscular reaching a length of 92–183 cm (36–72 in) with a 66–102 cm (26–40 in) long tail and a shoulder height of 60–70 cm (24–28 in).