![Window Functions in PostgreSQL. A must-know for any data practitioner | by Merlin Schäfer | Jan, 2023 | Towards Data Science Window Functions in PostgreSQL. A must-know for any data practitioner | by Merlin Schäfer | Jan, 2023 | Towards Data Science](https://miro.medium.com/max/1400/1*iMP0OGX9ehutMqtotNS1vw.png)
Window Functions in PostgreSQL. A must-know for any data practitioner | by Merlin Schäfer | Jan, 2023 | Towards Data Science
![sql - Is it possible to find out the number of items in a row by using window functions in PostgreSQL? - Stack Overflow sql - Is it possible to find out the number of items in a row by using window functions in PostgreSQL? - Stack Overflow](https://i.stack.imgur.com/iSjvp.png)
sql - Is it possible to find out the number of items in a row by using window functions in PostgreSQL? - Stack Overflow
![window functions - How to get previous date record of the most recent date record in PSQL - Database Administrators Stack Exchange window functions - How to get previous date record of the most recent date record in PSQL - Database Administrators Stack Exchange](https://i.stack.imgur.com/BF8DU.png)
window functions - How to get previous date record of the most recent date record in PSQL - Database Administrators Stack Exchange
![Introducing Performance Improvement of Window Functions in PostgreSQL 15 - Percona Database Performance Blog Introducing Performance Improvement of Window Functions in PostgreSQL 15 - Percona Database Performance Blog](https://www.percona.com/blog/wp-content/uploads/2022/08/Window-Functions-in-PostgreSQL-15.png)