PostgreSQL is an object-relational database management system that offers more features than MySQL. It gives you more flexibility in data types, scalability, concurrency, and data integrity.PostgreSQL is preferred when a high level of security is required and the number of transactions or queries is large. MongoDB is used for unstructured data storage and is not suitable for highly secure applications.PostgreSQL is reliable

PostgreSQL uses a Write-Ahead Log to protect against system crashes, so that if a transaction has committed that hasn't yet been written to the database, the Write-Ahead Log is replayed, and the transaction is then committed.

Why is PostgreSQL gaining popularity : Because the business world generates increasingly more data, the demand for reliable and efficient database management systems, such as PostgreSQL, will be constantly growing. Moreover, thanks to the huge support from the open source community, PostgreSQL is constantly evolving and being improved.

When to choose PostgreSQL vs MySQL

MySQL is preferred for managing read-only commands. It is not preferred when concurrency is required. PostgreSQL is preferred for managing read-write operations, large datasets, and complex queries. But it's not preferred for read-only operations.

What is the advantage of using Postgres : It supports layered transactions, savepoints, and various transaction isolation levels and offers explicit transaction control. Another great feature of PostgreSQL is its concurrency control. It offers multi-version concurrency control (MVCC), which PostgreSQL uses, to ensure high concurrency.

MySQL is generally known to be faster with read-only commands at the cost of concurrency, while PostgreSQL works better with read-write operations, massive datasets, and complicated queries.

One of the main drawbacks is the interpretation overhead inherent to traditional interpretive SQL engines, which hinders optimal CPU utilization. Additionally, PostgreSQL uses an interpreter to execute SQL queries, resulting in overhead caused by indirect calls to handler functions and runtime checks.

Why Instagram uses PostgreSQL

Instagram uses Postgres as its primary transactions database. For each hashtag, it stores the media_count in a table. This allows us to render the Hashtag and some meta information on the search page.Disadvantages of PostgreSQL

• Postgres is not owned by one organization.
• Changes made for speed improvement requires more work than MySQL as PostgreSQL focuses on compatibility.
• Many open source apps support MySQL, but may not support PostgreSQL.
• On performance metrics, it is slower than MySQL.

The PostgreSQL Global Development Group supports a major version for 5 years after its initial release. After this, a final minor version will be released and the software will then be unsupported (end-of-life).

PostgreSQL was built to be ACID-compliant from the ground up and it's optimal when concurrent transactions (MVCC) are required, but it is slower and less stable when it comes to read-only operations. MySQL is highly compatible with many different types of data storage engines.

Who should use PostgreSQL : PostgreSQL comes with many features aimed to help developers build applications, administrators to protect data integrity and build fault-tolerant environments, and help you manage your data no matter how big or small the dataset.

What is the greatest weakness of Postgres : Disadvantages of PostgreSQL

Changes made for speed improvement requires more work than MySQL as PostgreSQL focuses on compatibility. Many open source apps support MySQL, but may not support PostgreSQL. On performance metrics, it is slower than MySQL.

What are the limitations of Postgres

One of the main limitations of PostgreSQL is its lack of support for horizontal scaling. This means that as the workload on a PostgreSQL database increases, it becomes increasingly difficult to distribute the load across multiple machines to improve performance.

PostgreSQL can handle both structured and unstructured data, using SQL for structured data and JSON for unstructured data, making it especially useful for big data projects. Aside from being a storage system, PostgreSQL also excels at data cleaning and organization, offering various data mining and wrangling tools.Performance. For most workloads, the performance between Postgres and MySQL is comparable with at most 30% variations. On the other hand, regardless of which database you choose, if your query misses an index, it could be 10x ~ 1000x degradation.

Does NASA use Postgres : Federal agencies using Postgres include the Federal Aviation Administration (FAA), the National Aeronautics and Space Administration (NASA), the Department of Labor and multiple agencies throughout the Department of Defense (DoD).