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  2. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    95 characters; the 52 alphabet characters belong to the Latin script. The remaining 43 belong to the common script. The 33 characters classified as ASCII Punctuation & Symbols are also sometimes referred to as ASCII special characters. Often only these characters (and not other Unicode punctuation) are what is meant when an organization says a ...

  3. Varchar - Wikipedia

    en.wikipedia.org/wiki/Varchar

    The term varchar refers to a data type of a field (or column) in a database which can hold letters and numbers. Varchar fields can be of any size up to a limit, which varies by databases: an Oracle 11g database has a limit of 4000 bytes, [1] a MySQL 5.7 database has a limit of 65,535 bytes (for the entire row) [2] and Microsoft SQL Server 2008 ...

  4. UTF-8 - Wikipedia

    en.wikipedia.org/wiki/UTF-8

    Declared character set for the 10 million most popular websites since 2010 Use of the main encodings on the web from 2001 to 2012 as recorded by Google, [26] with UTF-8 overtaking all others in 2008 and over 60% of the web in 2012 (since then approaching 100%). UTF-8 is the only encoding of Unicode (explicitly) listed there, and the rest only ...

  5. Numeric character reference - Wikipedia

    en.wikipedia.org/wiki/Numeric_character_reference

    There is another kind of character reference called a character entity reference, which allows a character to be referred to by a name instead of a number. (Naming a character creates a character entity.) HTML defines some character entities, but not many; all other characters can only be included by direct encoding or using NCRs.

  6. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  7. Universally unique identifier - Wikipedia

    en.wikipedia.org/wiki/Universally_unique_identifier

    This number would be equivalent to generating 1 billion UUIDs per second for about 86 years. A file containing this many UUIDs, at 16 bytes per UUID, would be about 43.4 exabytes (37.7 EiB ). The smallest number of version-4 UUIDs which must be generated for the probability of finding a collision to be p is approximated by the formula

  8. Unicode - Wikipedia

    en.wikipedia.org/wiki/Unicode

    This number arises from the limitations of the UTF-16 character encoding, which can encode the 2 16 code points in the range U+0000 through U+FFFF except for the 2 11 code points in the range U+D800 through U+DFFF, which are used as surrogate pairs to encode the 2 20 code points in the range U+10000 through U+10FFFF.

  9. Enclosed Alphanumerics - Wikipedia

    en.wikipedia.org/wiki/Enclosed_alphanumerics

    Enclosed Alphanumerics is a Unicode block of typographical symbols of an alphanumeric within a circle, a bracket or other not-closed enclosure, or ending in a full stop.. It is currently fully allocated.