Let us say you have a requirement to use the results of a piece of code in your complex query. Instead of writing that piece of code everywhere, you can create a temporary table of use Vertica WITH clause. This WITH clause can be used to improve your complex SQL queries that have complex sub-queries, thus improving overall execution speed of your queries. SQL WITH clause will allow you to name your complex, repeat sub-query. You can use that name anywhere in your query just like normal database table. Vertica…