SQL


What is SQL?

Structured Query Language (SQL) is a highly popular domain specific language (DSL) used to communicate with relational database management systems (RDBMS). SQL is a standard that is based on the "relational model", defined by professor E.F. Codd, of IBM during the 1960's and 1970s. Codd defined both a relational algebra and a relational calculus as foundational models in his endeavor to reinvent database management systems. This led to his seminal 1970 paper "A Relational Model of Data for Large Shared Data Banks". Commonly used implementations of SQL include Oracle, IBM's DB2, Postgres, MySQL, and SQLite. Notably, SQLite is not a client/server system, but rather an embedded database that is used as a core application-level storage system in macOS, iOS, and Android. There has been much debate over what constitutes a "real" relational system, as some widely used database systems famously lacked features that Codd considered foundational to the relational model, such as "foreign keys". The flexibility of SQL has proven so powerful that many non-relational systems (e.g. Apache Spark) have implemented subsets or variants of the language to make it easier for people to draw upon their capabilities.

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SQL Resources

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SQL Engineer Jobs

BI & Analytics ~ Solution Architect/Principal Consultant
BI & Analytics ~ Solution Architect/Principal Consultant
501-1000 employees
Knowledge, Skills, and Experience. Experience with other Oracle BI Applications a plus. Very good skills with Oracle Middleware and Database.
About Inspirage: The Integrated Supply Chain Specialists
BI & Analytics ~ Solution Architect/Principal Consultant
501-1000 employees
BI & Analytics ~ Solution Architect/Principal Consultant
Knowledge, Skills, and Experience. Experience with other Oracle BI Applications a plus. Very good skills with Oracle Middleware and Database.
About Inspirage: The Integrated Supply Chain Specialists
EFAS Integration Business Analyst
EFAS Integration Business Analyst
About Canadian Natural Resources Limited (CNRL): Canadian Natural is one of the largest independent crude oil and natural gas producers in the world. The Company continually targets cost effective alternatives to develop our portfolio of projects...
EFAS Integration Business Analyst
About Canadian Natural Resources Limited (CNRL): Canadian Natural is one of the largest independent crude oil and natural gas producers in the world. The Company continually targets cost effective alternatives to develop our portfolio of projects...
Backend/Data Engineer - Employer Reporting
Backend/Data Engineer - Employer Reporting
About Collective Health: We have big ideas on how to improve your healthcare experience. We started by building a complete health benefits solution for leading U.S. companies.
Backend/Data Engineer - Employer Reporting
About Collective Health: We have big ideas on how to improve your healthcare experience. We started by building a complete health benefits solution for leading U.S. companies.
Data Integration Engineer
Data Integration Engineer
About StrongView, A Selligent Company.: Each customer is on a unique digital journey. Our integrated, omnichannel marketing engagement platform makes it easy to be present—and persuasive—at every twist and turn.
Data Integration Engineer
About StrongView, A Selligent Company.: Each customer is on a unique digital journey. Our integrated, omnichannel marketing engagement platform makes it easy to be present—and persuasive—at every twist and turn.
Data Scientist
Data Scientist
About Rover.io: Location-driven mobile content drives retention, engagement and new monetization opportunities. Rover helps you connect with your customers at the right time, with the right message and drive results
Data Scientist
About Rover.io: Location-driven mobile content drives retention, engagement and new monetization opportunities. Rover helps you connect with your customers at the right time, with the right message and drive results
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