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

Business Change Analyst
Business Change Analyst
Strong business modeling skills combined with an astute commercial acumen.   Relevant experience in a Business Analyst role.
About 118118Money: Looking for a loan? 118118 Money keep your offer open for 5 days, so you can shop around to get the best deal for you. Try us first! Representative 99.9% APR
Business Change Analyst
Strong business modeling skills combined with an astute commercial acumen.   Relevant experience in a Business Analyst role.
About 118118Money: Looking for a loan? 118118 Money keep your offer open for 5 days, so you can shop around to get the best deal for you. Try us first! Representative 99.9% APR
Product Data Analyst
Product Data Analyst
About Headspace Inc.: Live a happier, healthier life with just a few minutes of meditation a day on the Headspace app.
Product Data Analyst
About Headspace Inc.: Live a happier, healthier life with just a few minutes of meditation a day on the Headspace app.
Data Engineer
Data Engineer
About Best Doctors: Meta description
Data Engineer
About Best Doctors: Meta description
Engineering Manager (Data Infrastructure)
Engineering Manager (Data Infrastructure)
501-1000 employees
Engineering Manager (Data Infrastructure)
501-1000 employees
Engineering Manager (Data Infrastructure)
Health Data Engineer
Health Data Engineer
About Grand Rounds, Inc.: Schedule appointments with the top 3% of specialists in the country, or have the best doctors in the world consult on your diagnosis and treatment.
Health Data Engineer
About Grand Rounds, Inc.: Schedule appointments with the top 3% of specialists in the country, or have the best doctors in the world consult on your diagnosis and treatment.
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