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Programming language
Appeared in1974
Designed byDonald D. Chamberlin
Raymond F. Boyce
Software developerIBM
Stable releaseSQL:2008 (2008)
Typing disciplineStatic, strong
Major implementationsMany
DialectsSQL-86, SQL-89, SQL-92, SQL:1999, SQL:2003, SQL:2008
Influenced byDatalog
InfluencedAgena, CQL, LINQ, Windows PowerShell 
Operating systemCross-platform
Usual file extensions.sql


Structured Query Language
CaptionStructured Query Language
Latest Release VersionSQL:2008
Latest Release Date2008
StandardISO/IEC 9075

     Home | programming language | SQL

SQL (officially like "S-Q-L" but often like "sequel"), often referred to as Structured Query Language, is a database computer language designed for managing data in relational database management systems (RDBMS), and originally based upon relational algebra and calculus. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control. SQL was one of the first commercial languages for Edgar F. Codd's relational model, as described in his influential 1970 paper, "A Relational Model of Data for Large Shared Data Banks". Despite not adhering to the relational model as described by Codd, it became the most widely used database language.

SQL Video presents SQL Server 2005 Video Tutorial Series. In this first 10-minute video, you will learn how to install SQL Server 2005 Express and the SQL Server Management Studio.
9.92 min. | 4.39 user rating
Getting into the admin control panel of a vunerable website.
2.05 min. | 4.07 user rating
PLEASE CHECK OUT THE SECOND VIDEO OF THIS A quick and easy user registration using php, sql and phpmyadmin. For full size and source codes: SQL: CREATE TABLE `user` ( `id` int(10) unsigned NOT NULL auto_increment, `username` varchar(20) NOT NULL default '', `password` varchar(50) NOT NULL default '', `email` varchar(40) NOT NULL default '', `ip` varchar(20) NOT NULL default '', PRIMARY KEY (`id`) ) ENGINE=MyISAM AUTO_INCREMENT=1 DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;
16.37 min. | 3.83 user rating Introduction to SQL - SQL LESSON 1
8.52 min. | 4.84 user rating
While this may be 1-2-3 for web application programmers, it is quite revealing for those not involved with web application security on a daily basis. This is an example of how easy it is to bypass client-side security checks and hack your way in.
3.42 min. | 4.72 user rating
Renowned Oracle PL/SQL expert, Steven Feuerstein, presents "PL/SQL Best Practices" -- offering high-level principles to guide our work.
62.08 min. | 4.79 user rating
Song-Requiem For a Dream Download Microsoft Sql Server 2000 From here: or: Execute SQLEVAL.exe. Go to the folder where u install the files. Press AutoRun.exe Then Install Database Server -After a few seconds, you should see a screen. Click Next to continue. -Make sure Local Computer is selected and click Next -Make sure Create a new instance of SQL Server, or install Client Tools is selected, then click Next -In the next window , you can type anything you want in those fields, as its not really important, its just for registering the software. -Read through the Software License Agreement and click Yes if you accept it. (in most cases, you can just click Yes unlessyou like reading really boring legal stuff) -Now on the next screen, make sure to select Server and Client Tools and click Next -Make sure Default is selected and click Next -Click Typical and click Next (you could change where it installs to, but we will use the default directory in this How-To) -Click Use the same account for each service. Auto start SQL Server Service. and then select Use the Local System accountand click Next -This is a VERY important step. Select Mixed Mode (Windows Authentication and SQL Server Authentication) then enter a strong password in both the boxes below. After you have finished, click Next -At this screen, just click Next. This will start the installation and may take a few minutes, depending on your computer. -Congratulations! You have installed <b>...</b>
10.15 min. | 4.67 user rating
Hacking demonstration using SQL injection get the original file here: This hack makes on the news:
1.83 min. | 4.05 user rating
This PHP tutorial elaborates on my second PHP tutorial which covers authentication. This PHP tutorial covers a more advanced PHP script which allow/denies users access to a specific website. Visit for more info, tutorials and forum! Apologies for the belch half way through, I was unaware I uploaded that version of the tutorial ;) Please view the video response as it helps prevent possible SQL attack on your database(s)
9.50 min. | 4.40 user rating
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1.58 min. | 4.25 user rating

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The Smart DBA's Guide to SQL Server Disaster Recovery, Part 1 - SQL Server Magazine Tweet this news
SQL Server Magazine--Scheduling regular backups� while a “must do"� is insufficient for proper disaster-recovery planning in -SQL- Server environments. ... - Date : Mon, 25 Oct 2010 21:41:10 GMT+00:00
Microsoft Updates SQL Azure and SQL Server 2008 R2 - Softpedia Tweet this news
Softpedia--The software giant has refreshed both -SQL- Azure, Azure Services Platform's cloud computing database services, and -SQL- Server 2008 R2 RTM the offering ... - Date : Mon, 25 Oct 2010 10:00:49 GMT+00:00
72% of DBAs Manage at Least Two Types of Database Platforms, According to New ... - San Francisco Chronicle Tweet this news
San Francisco Chronicle--Microsoft -SQL- Server and Oracle were cited as the most common database platforms, with 62% of respondents working with -SQL- Server and 60% with Oracle. ... - Date : Mon, 25 Oct 2010 14:06:41 GMT+00:00
SQL Data & Accounts Support Engineer - Tweet this news Client is a business-led consultancy and software developer, serving the mid-market. They operate out of seven offices in the UK and Ireland Their ... - Date : Mon, 25 Oct 2010 16:42:46 GMT+00:00
SaaS outsourcing from peterevans - Tweet this news outsourcing platform is based on Microsoft -SQL- Server 2008 using the Microsoft SPLA licensing model for ASP applications. ... - Date : Sun, 24 Oct 2010 23:00:33 GMT+00:00
With this new connector, EntropySoft extends its family of IBM connectors - (press release) Tweet this news (press release)--Full-text search in the repository is possible using the EntropySoft -SQL- language. The retrieval of users and permissions is fully supported. ... - Date : Mon, 25 Oct 2010 11:38:06 GMT+00:00
SQL Server Developer - InfoGrok Tweet this news
InfoGrok--Job Description My client has an urgent requirement for a -Sql- server DWH Developer based in Bristol. You will have experience of -SQL- Server, both 2005 and ... - Date : Fri, 22 Oct 2010 06:27:13 GMT+00:00

Queries : Null and three-valued logic (3VL)

Queries : Null and three-valued logic (3VL)
p AND q p
True False Unknown
q True True False Unknown
False False False False
Unknown Unknown False Unknown

Queries : Null and three-valued logic (3VL)
p OR q p
True False Unknown
q True True True True
False True False Unknown
Unknown True Unknown Unknown

Queries : Null and three-valued logic (3VL)

Queries : Null and three-valued logic (3VL)
p NOT p
True False
False True
Unknown Unknown

Queries : Null and three-valued logic (3VL)
p=q p
True False Unknown
q True True False Unknown
False False True Unknown
Unknown Unknown Unknown Unknown

Procedural extensions : Date and time
Source Common
Full Name
ANSI/ISO Standard SQL/PSM SQL/Persistent Stored Modules
PSQL Procedural SQL
IBM SQL PL SQL Procedural Language (implements SQL/PSM)
T-SQL Transact-SQL
Mimer SQL SQL/PSM SQL/Persistent Stored Module (implements SQL/PSM)
MySQL SQL/PSM SQL/Persistent Stored Module (implements SQL/PSM)
Oracle PL/SQL Procedural Language/SQL (based on Ada)
PostgreSQL PL/pgSQL Procedural Language/PostgreSQL Structured Query Language (based on Oracle PL/SQL)
PostgreSQL PL/PSM Procedural Language/Persistent Stored Modules (implements SQL/PSM)

Cross-vendor portability :
Year Name Alias Comments
1986 SQL-86 SQL-87 First formalized by ANSI.
1989 SQL-89 FIPS 127-1 Minor revision, adopted as FIPS 127-1.
1992 SQL-92 SQL2, FIPS 127-2 Major revision (ISO 9075), Entry Level SQL-92 adopted as FIPS 127-2.
1999 SQL:1999 SQL3 Added regular expression matching, recursive queries, triggers, support for procedural and control-of-flow statements, non-scalar types, and some object-oriented features.
2003 SQL:2003 SQL 2003 Introduced XML-related features, window functions, standardized sequences, and columns with auto-generated values (including identity-columns).
2006 SQL:2006 SQL 2006 ISO/IEC 9075-14:2006 defines ways in which SQL can be used in conjunction with XML. It defines ways of importing and storing XML data in an SQL database, manipulating it within the database and publishing both XML and conventional SQL-data in XML form. In addition, it enables applications to integrate into their SQL code the use of XQuery, the XML Query Language published by the World Wide Web Consortium (W3C), to concurrently access ordinary SQL-data and XML documents.
2008 SQL:2008 SQL 2008 Legalizes ORDER BY outside cursor definitions. Adds INSTEAD OF triggers. Adds the TRUNCATE statement.

Database management systems

ConceptsDatabase * ACID * CRUD * Null * Candidate key * Foreign key * Primary key * Superkey * Surrogate key * Armstrong's axioms
ObjectsRelation (Table) * View * Transaction * Log * Trigger * Index * Stored procedure * Cursor * Partition
ComponentsConcurrency control * Data dictionary * JDBC * ODBC * Query language * Query optimizer * Query plan

International Business Machines Corporation

Corporate DirectorsCathleen Black * Kenneth I. Chenault * Juergen Dormann * Michael L. Eskew * Shirley Ann Jackson * Minoru Makihara * Lucio A. Noto * James W. Owens * Samuel J. Palmisano * Joan E. Spero * Sidney Taurel * Lorenzo H. Zambrano
Hardware ProductsCell * Mainframe * Personal Computer * POWER
Software BrandsInformation Management * Lotus * Rational * SPSS * Tivoli * WebSphere
Consulting and IT ServicesIBM Global Services
See alsoIBM India * IBM PC compatible * IBM Public License * History * Acquisitions and spinoffs * Products

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