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  2. Table (database) - Wikipedia

    en.wikipedia.org/wiki/Table_(database)

    In a database, a table is a collection of related data organized in table format; consisting of columns and rows.. In relational databases, and flat file databases, a table is a set of data elements (values) using a model of vertical columns (identifiable by name) and horizontal rows, the cell being the unit where a row and column intersect. [1]

  3. Join (SQL) - Wikipedia

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

    This means that if the ON clause matches 0 (zero) rows in B (for a given row in A), the join will still return a row in the result (for that row)—but with NULL in each column from B. A left outer join returns all the values from an inner join plus all values in the left table that do not match to the right table, including rows with NULL ...

  4. List of date formats by country - Wikipedia

    en.wikipedia.org/wiki/List_of_date_formats_by...

    National standard format is yyyy-mm-dd. [161] dd.mm.yyyy format is used in some places where it is required by EU regulations, for example for best-before dates on food [162] and on driver's licenses. d/m format is used casually, when the year is obvious from the context, and for date ranges, e.g. 28-31/8 for 28–31 August.

  5. ISO 8601 - Wikipedia

    en.wikipedia.org/wiki/ISO_8601

    A single point in time can be represented by concatenating a complete date expression, the letter "T" as a delimiter, and a valid time expression. For example, "2007-04-05T14:30" . In ISO 8601:2004 it was permitted to omit the "T" character by mutual agreement as in "200704051430" , [ 37 ] but this provision was removed in ISO 8601-1:2019.

  6. Concatenation - Wikipedia

    en.wikipedia.org/wiki/Concatenation

    Many authors also use concatenation of a string set and a single string, and vice versa, which are defined similarly by S 1 w = { vw : v ∈ S 1} and vS 2 = { vw : w ∈ S 2}. In these definitions, the string vw is the ordinary concatenation of strings v and w as defined in the introductory section.

  7. Decorating for the holidays could be hazardous to your health ...

    www.aol.com/news/decorating-holidays-could...

    In addition to dangers posed by Christmas trees and string lights, officials are once again issuing warning about toys. CPSC, in collaboration with U.S. Customs and Border Protection, seized more ...

  8. Trump, 78, notched a 54% approval rating, one of his all-time highest, compared to about 46% who disapprove of him, an Emerson College poll found. Biden, 82, scored a 36% approval to 52% ...

  9. Damar Hamlin's life was saved by an AED. Here are 5 things ...

    www.aol.com/lifestyle/damar-hamlins-life-saved...

    Damar Hamlin advocates for AED accessibility and education. (Photo illustration: Alex Cochran for Yahoo News; photo: Joe Sargent/Getty Images)