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 Philadelphia,
so we've calculated your salary information for the San Francisco Bay Area instead:
Based on real Hired interview data, SQL developers in Philadelphia earn an average annual salary of
Based on real Hired interview data, SQL developers in SF Bay Area earn an average annual salary of
$121,928
The salaries of candidates in this role range from a low of $98,000 to a high of $150,000, with a median salary of $120,000.

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SQL Resources

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SQL Engineer Jobs

Database Support 3
Database Support 3
5001+ employees
Are you interested in expanding your career through experience and exposure, all the while supporting a mission that seeks to ensure the security of our nation and its allies? If so, then Northrop ...
About Northrop Grumman: Northrop Grumman is a provider of autonomous systems, strike, logistics, C4ISR and cyber solutions for government and commercial customers.
Database Support 3
5001+ employees
Database Support 3
Are you interested in expanding your career through experience and exposure, all the while supporting a mission that seeks to ensure the security of our nation and its allies? If so, then Northrop ...
About Northrop Grumman: Northrop Grumman is a provider of autonomous systems, strike, logistics, C4ISR and cyber solutions for government and commercial customers.
Data Engineer - Summer Intern - University Students
Data Engineer - Summer Intern - University Students
5001+ employees
Qualifications<br><br>* University student in their junior year in a Computer Science, Engineering or equivalent program; expected graduation date of December 2019 or May 2020<br>* Or, currently co...
About McKinsey: McKinsey & Company provides management consulting services to businesses, governments, non-governmental organizations, and not-for-profits.
Data Engineer - Summer Intern - University Students
5001+ employees
Data Engineer - Summer Intern - University Students
Qualifications<br><br>* University student in their junior year in a Computer Science, Engineering or equivalent program; expected graduation date of December 2019 or May 2020<br>* Or, currently co...
About McKinsey: McKinsey & Company provides management consulting services to businesses, governments, non-governmental organizations, and not-for-profits.
Senior Data Scientist
Senior Data Scientist
501-1000 employees
Job Title: Data Scientist<br><br>Location: Denver, CO<br><br>Function: Engineering<br><br>Position Type: Full-Time<br><br>Position Level: Senior - Principal<br><br>Travel Requirement: Minimal Trave...
About Xactly: Xactly Corporation provides Software as a Service to companies that want to improve their incentive programs and manage sales performance.
Senior Data Scientist
501-1000 employees
Senior Data Scientist
Job Title: Data Scientist<br><br>Location: Denver, CO<br><br>Function: Engineering<br><br>Position Type: Full-Time<br><br>Position Level: Senior - Principal<br><br>Travel Requirement: Minimal Trave...
About Xactly: Xactly Corporation provides Software as a Service to companies that want to improve their incentive programs and manage sales performance.
Business Systems Analyst (Data Analysis/Business Intelligence)
Business Systems Analyst (Data Analysis/Business Intelligence)
5001+ employees
Conduent is the world's largest provider of diversified business process services with leading capabilities in transaction processing, automation, analytics and constituent experience. We work with...
About Conduent: Conduent is a provider of diversified business process services with leading capabilities in digital processing, automation and analytics.
Business Systems Analyst (Data Analysis/Business Intelligence)
5001+ employees
Business Systems Analyst (Data Analysis/Business Intelligence)
Conduent is the world's largest provider of diversified business process services with leading capabilities in transaction processing, automation, analytics and constituent experience. We work with...
About Conduent: Conduent is a provider of diversified business process services with leading capabilities in digital processing, automation and analytics.
(USA-IL-Chicago) Big Data and Analytics Cloud Consultant, Google Cloud Professional Services
(USA-IL-Chicago) Big Data and Analytics Cloud Consultant, Google Cloud Professional Services
5001+ employees
As a Big Data and Analytics Cloud Consultant, you will work directly with Google's most strategic customers on critical projects to help them transform their businesses. You will provide management...
About Google: Google is a multinational corporation that specializes in Internet-related services and products.
(USA-IL-Chicago) Big Data and Analytics Cloud Consultant, Google Cloud Professional Services
5001+ employees
(USA-IL-Chicago) Big Data and Analytics Cloud Consultant, Google Cloud Professional Services
As a Big Data and Analytics Cloud Consultant, you will work directly with Google's most strategic customers on critical projects to help them transform their businesses. You will provide management...
About Google: Google is a multinational corporation that specializes in Internet-related services and products.
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