Summary

In this chapter, we discussed how to get started with PostgreSQL by installing it, creating a database and a table, and then inserting data into the table. These are some of the basic concepts when working with databases, and by knowing these key concepts, you can build on them to create more ways to work with the data. Next, we discussed how race conditions affect transaction integrity for financial systems, and how database locks prevent financial transaction integrity issues. After that, we discussed how to guarantee transaction integrity with database locks, with the use of row-level locks. Lastly, we discussed the best practices when using database locks to ensure smooth and efficient operations. By understanding how database locks work, we can improve the data integrity and performance of our applications.

In the next chapter, we will discuss how to use managed ledger databases, specifically Amazon Quantum Ledger Database (QLDB), which is a non-relational database...