All the Relational Database Management Systems (RDMS) like My SQL, MS Access, Oracle, Sybase, Informix, Postgres and SQL Server use SQL as their standard database language.Also, they are using different dialects, such as − When you are executing an SQL command for any RDBMS, the system determines the best way to carry out your request and SQL engine figures out how to interpret the task.SQL is a language to operate databases; it includes database creation, deletion, fetching rows, modifying rows, etc.SQL is an ANSI (American National Standards Institute) standard language, but there are many different versions of the SQL language.You can use Sqoop to import data from a relational database management system (RDBMS) such as My SQL or Oracle into the Hadoop Distributed File System (HDFS), transform the data in Hadoop Map Reduce, and then export the data back into an RDBMS.Sqoop automates most of this process, relying on the database to describe the schema for the data to be imported.Sqoop uses Map Reduce to import and export the data, which provides parallel operation as well as fault tolerance.This document describes how to get started using Sqoop to move data between databases and Hadoop and provides reference information for the operation of the Sqoop command-line tool suite.
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