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.

How much do SQL developers make?

We don't have enough data for Washington D.C.,
so we've calculated your salary information for the San Francisco Bay Area instead:
Based on real Hired interview data, SQL developers in Washington D.C. earn an average annual salary of
Based on real Hired interview data, SQL developers in SF Bay Area earn an average annual salary of
$119,119
The salaries of candidates in this role range from a low of $10,000 to a high of $190,000, with a median salary of $120,000.

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We expect SQL developers to receive 3 Interview Requests on Hired.

SQL Resources

Check out the resources below to continue sharpening your SQL skills

SQL Engineer Jobs

SOA administrator
SOA administrator
5001+ employees
Job Summary:<br><br>Enterprsie Analytics practice is seeking candidates for the position of a SOA administrator.<br><br>Minimum Qualifications :<br><br>* Should have at least 7 years of experience ...
About Cognizant: Cognizant is a provider of information technology, consulting, and business process outsourcing services.
SOA administrator
5001+ employees
SOA administrator
Job Summary:<br><br>Enterprsie Analytics practice is seeking candidates for the position of a SOA administrator.<br><br>Minimum Qualifications :<br><br>* Should have at least 7 years of experience ...
About Cognizant: Cognizant is a provider of information technology, consulting, and business process outsourcing services.
Data Scientist
Data Scientist
Business Unit Description:<br><br>Our Risk Management teams work to protect the safety and soundness of our systems and are responsible for identifying, managing, measuring and mitigating a spectru...
Data Scientist
Data Scientist
Business Unit Description:<br><br>Our Risk Management teams work to protect the safety and soundness of our systems and are responsible for identifying, managing, measuring and mitigating a spectru...
ERP Business Analyst II
ERP Business Analyst II
The IT Shared Services Department at the University of North Texas System is seeking to hire an ERP Business Analyst II to join their team. This position is a member of the Student Administration B...
ERP Business Analyst II
ERP Business Analyst II
The IT Shared Services Department at the University of North Texas System is seeking to hire an ERP Business Analyst II to join their team. This position is a member of the Student Administration B...
Manager, Data & Analytics Modeler, Machine Learning
Manager, Data & Analytics Modeler, Machine Learning
Innovate. Collaborate. Shine. Lighthouse - KPMG's Center of Excellence for Advanced Analytics - has both applied data science, AI, and big data architecture capabilities. Here, you'll work with a d...
Manager, Data & Analytics Modeler, Machine Learning
Manager, Data & Analytics Modeler, Machine Learning
Innovate. Collaborate. Shine. Lighthouse - KPMG's Center of Excellence for Advanced Analytics - has both applied data science, AI, and big data architecture capabilities. Here, you'll work with a d...
Business Analyst II
Business Analyst II
About Bank of Nova Scotia (Scotiabank): Scotiabank is Canada’s international bank and financial services provider.
Business Analyst II
About Bank of Nova Scotia (Scotiabank): Scotiabank is Canada’s international bank and financial services provider.
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