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A SQL Developer is a software engineer who specializes in the design, development, implementation and maintenance of computer databases using the Structured Query Language (SQL). The primary objective of a SQL developer is to store and access data efficiently. A successful database application requires clear understanding of its purpose from both technical as well as non-technical perspectives. The job duties for a SQL developer include designing efficient database structures that are logical to users; developing stored procedures which can be used in applications; creating triggers on tables to ensure data integrity through validations; writing complex queries for business processes by joining multiple tables using joins like left join, right join etc.; optimizing existing queries to make sure they run quickly; testing new features or modifications made before releasing them into production environment; tuning performance issues related with slow running queries and making sure that any changes do not affect other areas within an application. This also includes troubleshooting errors due to poor query designs or incorrect syntax used while coding it out. As part of the job responsibilities, documenting all changes done during development process such as code versions control systems may become necessary in order for developers working on different environments maintain consistency throughout their work—especially when dealing with large scale projects containing hundreds if not thousands lines of code written by many people over time.. Additionally, he/she must have knowledge about security measures needed so information cannot be accessed without proper authentication credentials. To succeed at this role you need strong analytical skills combined with excellent problem solving abilities along with good communication skills since they will often collaborate closely within teams consisting other professionals including system analysts or project managers depending upon size complexity involved each particular project undertaken.. Having experience web technologies would beneficial because some cases integrating already established websites might required create relational back end connect website’s front end user interface better manage customer’s interactions site functionality requested them.. Finally having familiarity object orientated programming techniques increase chances getting hired position high demand these days given rise Big Data industry where storing vast amounts structured unstructured quickly effectively becoming number one priority major organizations today...