Question: Query optimization is an important step during query processing. Discuss the main goal of query optimization. SQL processing includes parsing and execution of SQL

Query optimization is an important step during query processing. Discuss the main goal of query optimization. SQL processing includes parsing and execution of SQL statements. Explain how SQL statements are parsed, validated and scanned using examples. Organizations that collect large amount of data (including structured, semi- structured and unstructured data) are turning to big data and NOSQL database. Discuss TWO (2) reasons on why big data matters to business using examples. [Note: you are required to discuss the reasons with specific examples; and you are also required to include a comparison between relational and non-relational databases]

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