Optimizing query structure

A query is simply a request for information, so in the field of data analytics, a query is a request for data. It is how we call data from a database to our local environment. Several different programs allow you to query a database, and some are more popular than others, but often the biggest difference in the performance of queries is decided by how optimized they are. If you are making a simple query to a small database, efficiency and performance may not mean very much, but as the amount of data you are pulling gets bigger and your queries get more and more complicated, performance becomes a bigger issue. When you get to the point where a query takes hours or even days to run, you might want to consider optimizing it.

Filtering and subsets

First and foremost, it should be obvious that the less information you pull, the faster the process will be. Filtering is the process of being selective about which data you are querying. There are many ways to...