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  2. Microsoft Access - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Access

    An additional solution, the SQL Server Migration Assistant for Access (SSMA), continues to be available for free download from Microsoft. A variety of upgrading options are available. After migrating the data and queries to SQL Server, the Access database can be linked to the SQL database, subject to data type conversion limitations:

  3. Microsoft SQL Server - Wikipedia

    en.wikipedia.org/wiki/Microsoft_SQL_Server

    Microsoft SQL Server (Structured Query Language) is a proprietary relational database management system developed by Microsoft.As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications—which may run either on the same computer or on another computer across a network (including the Internet).

  4. Microsoft Query - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Query

    Microsoft Query is a visual method of creating database queries using examples based on a text string, the name of a document or a list of documents. The QBE system converts the user input into a formal database query using Structured Query Language (SQL) on the backend, allowing the user to perform powerful searches without having to ...

  5. Correlated subquery - Wikipedia

    en.wikipedia.org/wiki/Correlated_subquery

    Correlated subquery. In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values from the outer query. Because the subquery may be evaluated once for each row processed by the outer query, it can be slow.

  6. PHP - Wikipedia

    en.wikipedia.org/wiki/PHP

    PHP code is usually processed on a web server by a PHP interpreter implemented as a module, a daemon or a Common Gateway Interface (CGI) executable. On a web server, the result of the interpreted and executed PHP code—which may be any type of data, such as generated HTML or binary image data—would form the whole or part of an HTTP response.

  7. Select (SQL) - Wikipedia

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

    Select (SQL) The SQL SELECT statement returns a result set of rows, from one or more tables. [1] [2] A SELECT statement retrieves zero or more rows from one or more database tables or database views. In most applications, SELECT is the most commonly used data manipulation language (DML) command. As SQL is a declarative programming language ...

  8. Join (SQL) - Wikipedia

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

    Join (SQL) A Venn diagram representing the full join SQL statement between tables A and B. A join clause in the Structured Query Language ( SQL) combines columns from one or more tables into a new table. The operation corresponds to a join operation in relational algebra. Informally, a join stitches two tables and puts on the same row records ...

  9. Query by Example - Wikipedia

    en.wikipedia.org/wiki/Query_by_Example

    Query by Example. Query by Example ( QBE) is a database query language for relational databases. It was devised by Moshé M. Zloof at IBM Research during the mid-1970s, in parallel to the development of SQL. [1] It is the first graphical query language, using visual tables where the user would enter commands, example elements and conditions.