The best features PostgreSQL on Ubuntu offers are complex joins, which allow us to perform advanced SQL queries, providing the atomicity of our tables, ACID properties for transaction safety, and scalability that we can expand to, as we currently have 10 lakh users, and it is easily scalable. Complex joins are the best feature that PostgreSQL on Ubuntu provides because I have been using NoSQL solutions such as MongoDB, but PostgreSQL has better efficiency for complex queries when used correctly. PostgreSQL on Ubuntu has positively impacted our organization because, from the initial phase with around 1,000 plus users during user accessibility testing, we defined the tables in such a manner that even with future scalability increases, it would function well, and now it has grown to 10 lakh users, still holding up well with fast data retrieval and good query performance, supported by effective indexing methods. In our user table with PostgreSQL on Ubuntu, we initially added indexing on the email property, but after a while, we found that the phone number field was also frequently used, and adding indexing to it improved our query retrieving speed and efficiency by almost 20 to 30 percent.
