MongoDB Database DevelopmentRead Chapters 13 and 14 of Beginning SQL Server 2012 for Developers Based on your learning above from Chapters above, describe and explain the Following:Provide example of DECLARING AND WORKING WITH VARIABLESWhat are TEMPORARY TABLES, what are they used. Provide an exampleWhat is Grouping Data, what is it used for . Provide an exampleWhat is Subqueries. What is it used for? Provide an example.Describe Pivoting Data, and provide an example of thatPrepare your results in a WORD DocumentSubmit your Results before the deadline using the link provided below: