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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Based on real Hired interview data, SQL developers in SF Bay Area earn an average annual salary of
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SQL Resources

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SQL Engineer Jobs

SAP Work Management, Business Analyst I
SAP Work Management, Business Analyst I
1001-1500 employees
Participate in process improvement teams in support of systems - work in partnership with more experienced functional analysts in testing...
SAP Work Management, Business Analyst I
1001-1500 employees
SAP Work Management, Business Analyst I
Participate in process improvement teams in support of systems - work in partnership with more experienced functional analysts in testing...
Technical Data Analyst
Technical Data Analyst
About Earnest Inc.: Earnest offers low-interest loans based on your unique financial profile, including student loan refinancing and personal loans. Start saving today with the interest rate you deserve.
Technical Data Analyst
About Earnest Inc.: Earnest offers low-interest loans based on your unique financial profile, including student loan refinancing and personal loans. Start saving today with the interest rate you deserve.
Business Analyst / Product Intern
Business Analyst / Product Intern
1-15 employees
Business Analyst / Product Intern
1-15 employees
Business Analyst / Product Intern
Business Intelligence Analyst
Business Intelligence Analyst
201-500 employees
About Checkout.com: Online Payments
Business Intelligence Analyst
201-500 employees
Business Intelligence Analyst
About Checkout.com: Online Payments
Financial Analyst, Business FP&A
Financial Analyst, Business FP&A
Financial Analyst, Business FP&A
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