The most important query optimizations

Queries statements are used to retrieve data from a database. We can get the same results by writing different SQL queries for different needs. But using the optimal query is important when performance is considered for your business. So, you need to SQL query tuning based on this requirement. In this section, we will cover the most important queries importation with WHERE, GROUP BY, and ORDER BY.

Optimizing a query with the WHERE clause

Before we start looking at how to optimize a query with the WHERE clause, you need to know the optimization recipe that you have to apply to be efficient.

Here is an optimization recipe:

1. Identify the query that is slow
2. Run an EXPLAIN plan on this slow...