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MySQL ( / ˌmaɪˌɛsˌkjuːˈɛl /) [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.
History. SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd in the early 1970s. 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 ...
Dynamic web page: example of server-side scripting (PHP and MySQL) Originally designed to create dynamic web pages , PHP now focuses mainly on server-side scripting , [283] and it is similar to other server-side scripting languages that provide dynamic content from a web server to a client , such as Python , Microsoft 's ASP.NET , Sun ...
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.
For example, a table of 128 rows with a boolean column requires 128 bytes a row-oriented format (one byte per boolean) but 128 bits (16 bytes) in a column-oriented format (via a bitmap). Another example is the use of run-length encoding to encode a column. Compressed size. Column-oriented benefits from smaller compressed size.
Programming style. Programming style, also known as coding style or code style, is a set of rules or guidelines that governs the layout of source code. Programming style may also refer an quality aspect of code that is interpreted subjectively. Some claim that following a particular programming style helps programmers read and understand code ...
In computing, SQL injection is a code injection technique used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker). [1] [2] SQL injection must exploit a security vulnerability in an application's software, for example, when user ...
This table lists the machine-readable file formats that can be exported from reference managers. These are typically used to share data with other reference managers or with other people who use a reference manager. To exchange data from one program to another, the first program must be able to export to a format that the second program may import.