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SQL (structured query language) is a programming language used to handle data in relational databases.It isn't a programming language and has no control over inflow statements or capability to perform calculations. SQL is the standard for penetrating data stored on the current big data platforms like Hadoop, NoSQL, and Apache Cassandra . A programmer needs to know how to write SQL queries to pierce, manipulate, and modernize data from the database. What's SQL? Structured Query Language( SQL) is a special-purpose programming language designed for managing data in relational database operation systems( RDBMS). It's used to produce and manage databases central to most enterprise software systems. Because SQL is so extensively used, there are numerous different versions of the language, most especially Oracle SQL, MySQL SQL, and Microsoft SQL Garçon. Taken together, these data mean that you are nearly clearly formerly working with SQL, indeed, if you do not know it. cruci