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Data science involves use of algorithms, software programs and statistics to collate and process huge complex chunks of data. The benefits of data science can be felt in domains like e-commerce, healthcare, manufacturing, banking, finance and transport. To learn about SQL, we need to understand how a DBMS works. With DBMS, programmers can create, manage or select data. With SQL we can insert, update, delete and select data based on various filters and conditions. It is easy to analyze data using SQL queries than using excel sheets or any other methods.