Chapter 3
Higher Order Functions in JavaScript
Section 4
Joins with Map-Reduce
We will take some SQL SELECT statements and translate them to queries written using JavaScript higher order functions such as map, reduce, and filter. You will not only learn how to perform inner joins of two tables but you will also see an example performing a left join. We will also learn how to group our results. - Learn how to translate an SQL SELECT statement to map-reduce function applications - Understand how inner joins and left joins can be translated to map-reduce applications - Discover the map-reduce equivalent of aggregating results