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  2. Hierarchical and recursive queries in SQL - Wikipedia

    en.wikipedia.org/wiki/Hierarchical_and_recursive...

    A common table expression, or CTE, (in SQL) is a temporary named result set, derived from a simple query and defined within the execution scope of a SELECT, INSERT, UPDATE, or DELETE statement.

  3. Having (SQL) - Wikipedia

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

    HAVING and WHERE are often confused by beginners, but they serve different purposes. WHERE is taken into account at an earlier stage of a query execution, filtering the rows read from the tables. If a query contains GROUP BY, rows from the tables are grouped and aggregated.

  4. SQL - Wikipedia

    en.wikipedia.org/wiki/SQL

    SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...

  5. Relational database - Wikipedia

    en.wikipedia.org/wiki/Relational_database

    In SQL, an INNER JOIN prevents a cartesian product from occurring when there are two tables in a query. For each table added to a SQL Query, one additional INNER JOIN is added to prevent a cartesian product. Thus, for N tables in an SQL query, there must be N−1 INNER JOINS to prevent a cartesian product.

  6. MySQL - Wikipedia

    en.wikipedia.org/wiki/MySQL

    MySQL (/ ˌ m aɪ ˌ ɛ s ˌ k juː ˈ ɛ l /) [5] is an open-source relational database management system (RDBMS). [5] [6] Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, [7] and "SQL", the acronym for Structured Query Language.

  7. Database schema - Wikipedia

    en.wikipedia.org/wiki/Database_schema

    The formal definition of a database schema is a set of formulas (sentences) called integrity constraints imposed on a database. [citation needed] These integrity constraints ensure compatibility between parts of the schema. All constraints are expressible in the same language.

  8. Cher Says She Was 'Shocked' to Find Out Her Legal Name After ...

    www.aol.com/cher-says-she-shocked-her-220000794.html

    Cher made an unexpected discovery when she began the process of legally changing her name.. In her new memoir Cher: The Memoir, Part One, which was released on Nov. 19, the 78-year-old music ...

  9. Oracle Forms - Wikipedia

    en.wikipedia.org/wiki/Oracle_Forms

    Oracle Forms version 4.5 was really a major release rather than a "point release" of 4.0 despite its ".5" version number. It was named 4.5 in order to meet contractual obligations to support Forms 4 for a period of time for certain clients so it could market 4.5 as being a patch to 4.0, even though a full install was required, rather than ...