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  2. Null (SQL) - Wikipedia

    en.wikipedia.org/wiki/Null_(SQL)

    These mistakes are usually the result of confusion between Null and either 0 (zero) or an empty string (a string value with a length of zero, represented in SQL as ''). Null is defined by the SQL standard as different from both an empty string and the numerical value 0, however. While Null indicates the absence of any value, the empty string ...

  3. NaN - Wikipedia

    en.wikipedia.org/wiki/NaN

    In computing, NaN (/ n æ n /), standing for Not a Number, is a particular value of a numeric data type (often a floating-point number) which is undefined as a number, such as the result of 0/0. Systematic use of NaNs was introduced by the IEEE 754 floating-point standard in 1985, along with the representation of other non-finite quantities ...

  4. Wildcard character - Wikipedia

    en.wikipedia.org/wiki/Wildcard_character

    In SQL, wildcard characters can be used in LIKE expressions; the percent sign % matches zero or more characters, and underscore _ a single character. Transact-SQL also supports square brackets ([and ]) to list sets and ranges of characters to match, a leading caret ^ negates the set and matches only a character not within the list.

  5. Particular values of the Riemann zeta function - Wikipedia

    en.wikipedia.org/wiki/Particular_values_of_the...

    The zeta function values listed below include function values at the negative even numbers (s = −2, −4, etc.), for which ζ(s) = 0 and which make up the so-called trivial zeros. The Riemann zeta function article includes a colour plot illustrating how the function varies over a continuous rectangular region of the complex plane.

  6. List of nonlinear ordinary differential equations - Wikipedia

    en.wikipedia.org/wiki/List_of_nonlinear_ordinary...

    An example of a nonlinear delay differential equation; applications in number theory, distribution of primes, and control theory [5] [6] [7] Chrystal's equation: 1 + + + = Generalization of Clairaut's equation with a singular solution [8] Clairaut's equation: 1

  7. Zero waste - Wikipedia

    en.wikipedia.org/wiki/Zero_waste

    Zero waste refers to waste prevention as opposed to end-of-pipe waste management. [2] It is a "whole systems" approach that aims for a massive change in the way materials flow through society, resulting in no waste. [2] Zero waste encompasses more than eliminating waste through reducing, reusing, and recycling.

  8. Òran na Cloiche - Wikipedia

    en.wikipedia.org/wiki/Òran_na_Cloiche

    Òran na Cloiche ("Song of the Stone") is a Scottish Gaelic song, [1] written by poet Donald MacIntyre (Scottish Gaelic: Dòmhnall Mac an t-Saoir), also known as the Paisley Bard (Scottish Gaelic: Bàrd Phàislig).

  9. Prison slang - Wikipedia

    en.wikipedia.org/wiki/Prison_slang

    Prison slang, like other types of slang and dialects, varies by region.For that reason, the origins and the movement of prison slang across prisons are of interest to many linguists and cultural anthropologists.