PostgreSQL is a popular database that is used by many applications. It’s been in active development for 30 years! PostgreSQL (or Postgres) is a powerful database management system (DBMS) that you can use and worry less about performance.
Although Postgres has a powerful optimizer and can fix performance issues for you, sometimes you have to tweak your query to improve your query performance. You will find why in the next section.
Many developers tend to write the query first and then optimize it later. This is often not a good practice because it makes the query more complex and will