SELECT extract(hour from interval '4 days 4 hours') Īdvantages of using EXTRACT() Function in PostgreSQL SELECT extract(day from interval '4 days 4 hours')
![postgres week number postgres week number](https://www.enterprisedb.com/sites/default/files/screen_shot_2018-10-24_at_2.05.31_pm.png)
Let’s consider the following examples for understanding the PostgreSQL extract function examples. Implementing EXTRACT() Function in PostgreSQL
![postgres week number postgres week number](https://developer.bring.com/blog/metrics-at-mybring/images/many_graphs.png)
How does PostgreSQL EXTRACT() Function Work?Ĭonsider the following pictorial representation for understanding the working of the extract function as per the unit specified in the EXTRACT syntax, the PostgreSQL EXTRACT function extracts the unit from the input and returns that value. The week of the giver year as per the ISO 8601 The month number which is modulo by (0-11) Seconds with fractional parts, which is multiplied with ‘1000.’ Seconds with fractional parts, which is multiplied with ‘1000000.’
![postgres week number postgres week number](https://cdn.thenewstack.io/media/2019/06/ad3c284d-stonebraker-1024x768.jpg)
Hadoop, Data Science, Statistics & othersĬonsider the following syntax of the PostgreSQL EXTRACT() function: